private ICounter <string> GetFeatures(Document doc, Mention m1, Mention m2) { System.Diagnostics.Debug.Assert((m1.AppearEarlierThan(m2))); ICounter <string> features = new ClassicCounter <string>(); // global features features.IncrementCount("bias"); if (useDocSource) { features.IncrementCount("doc-type=" + doc.docType); if (doc.docInfo != null && doc.docInfo.Contains("DOC_ID")) { features.IncrementCount("doc-source=" + doc.docInfo["DOC_ID"].Split("/")[1]); } } // singleton feature conjunctions IList <string> singletonFeatures1 = m1.GetSingletonFeatures(dictionaries); IList <string> singletonFeatures2 = m2.GetSingletonFeatures(dictionaries); foreach (KeyValuePair <int, string> e in SingletonFeatures) { if (e.Key < singletonFeatures1.Count && e.Key < singletonFeatures2.Count) { features.IncrementCount(e.Value + "=" + singletonFeatures1[e.Key] + "_" + singletonFeatures2[e.Key]); } } SemanticGraphEdge p1 = GetDependencyParent(m1); SemanticGraphEdge p2 = GetDependencyParent(m2); features.IncrementCount("dep-relations=" + (p1 == null ? "null" : p1.GetRelation()) + "_" + (p2 == null ? "null" : p2.GetRelation())); features.IncrementCount("roles=" + GetRole(m1) + "_" + GetRole(m2)); CoreLabel headCL1 = HeadWord(m1); CoreLabel headCL2 = HeadWord(m2); string headPOS1 = GetPOS(headCL1); string headPOS2 = GetPOS(headCL2); features.IncrementCount("head-pos-s=" + headPOS1 + "_" + headPOS2); features.IncrementCount("head-words=" + WordIndicator("h_" + headCL1.Word().ToLower() + "_" + headCL2.Word().ToLower(), headPOS1 + "_" + headPOS2)); // agreement features AddFeature(features, "animacies-agree", m2.AnimaciesAgree(m1)); AddFeature(features, "attributes-agree", m2.AttributesAgree(m1, dictionaries)); AddFeature(features, "entity-types-agree", m2.EntityTypesAgree(m1, dictionaries)); AddFeature(features, "numbers-agree", m2.NumbersAgree(m1)); AddFeature(features, "genders-agree", m2.GendersAgree(m1)); AddFeature(features, "ner-strings-equal", m1.nerString.Equals(m2.nerString)); // string matching features AddFeature(features, "antecedent-head-in-anaphor", HeadContainedIn(m1, m2)); AddFeature(features, "anaphor-head-in-antecedent", HeadContainedIn(m2, m1)); if (m1.mentionType != Dictionaries.MentionType.Pronominal && m2.mentionType != Dictionaries.MentionType.Pronominal) { AddFeature(features, "antecedent-in-anaphor", m2.SpanToString().ToLower().Contains(m1.SpanToString().ToLower())); AddFeature(features, "anaphor-in-antecedent", m1.SpanToString().ToLower().Contains(m2.SpanToString().ToLower())); AddFeature(features, "heads-equal", Sharpen.Runtime.EqualsIgnoreCase(m1.headString, m2.headString)); AddFeature(features, "heads-agree", m2.HeadsAgree(m1)); AddFeature(features, "exact-match", m1.ToString().Trim().ToLower().Equals(m2.ToString().Trim().ToLower())); AddFeature(features, "partial-match", RelaxedStringMatch(m1, m2)); double editDistance = StringUtils.EditDistance(m1.SpanToString(), m2.SpanToString()) / (double)(m1.SpanToString().Length + m2.SpanToString().Length); features.IncrementCount("edit-distance", editDistance); features.IncrementCount("edit-distance=" + ((int)(editDistance * 10) / 10.0)); double headEditDistance = StringUtils.EditDistance(m1.headString, m2.headString) / (double)(m1.headString.Length + m2.headString.Length); features.IncrementCount("head-edit-distance", headEditDistance); features.IncrementCount("head-edit-distance=" + ((int)(headEditDistance * 10) / 10.0)); } // distance features AddNumeric(features, "mention-distance", m2.mentionNum - m1.mentionNum); AddNumeric(features, "sentence-distance", m2.sentNum - m1.sentNum); if (m2.sentNum == m1.sentNum) { AddNumeric(features, "word-distance", m2.startIndex - m1.endIndex); if (m1.endIndex > m2.startIndex) { features.IncrementCount("spans-intersect"); } } // setup for dcoref features ICollection <Mention> ms1 = new HashSet <Mention>(); ms1.Add(m1); ICollection <Mention> ms2 = new HashSet <Mention>(); ms2.Add(m2); Random r = new Random(); CorefCluster c1 = new CorefCluster(20000 + r.NextInt(10000), ms1); CorefCluster c2 = new CorefCluster(10000 + r.NextInt(10000), ms2); string s2 = m2.LowercaseNormalizedSpanString(); string s1 = m1.LowercaseNormalizedSpanString(); // discourse dcoref features AddFeature(features, "mention-speaker-PER0", Sharpen.Runtime.EqualsIgnoreCase(m2.headWord.Get(typeof(CoreAnnotations.SpeakerAnnotation)), "PER0")); AddFeature(features, "antecedent-is-anaphor-speaker", CorefRules.AntecedentIsMentionSpeaker(doc, m2, m1, dictionaries)); AddFeature(features, "same-speaker", CorefRules.EntitySameSpeaker(doc, m2, m1)); AddFeature(features, "person-disagree-same-speaker", CorefRules.EntityPersonDisagree(doc, m2, m1, dictionaries) && CorefRules.EntitySameSpeaker(doc, m2, m1)); AddFeature(features, "antecedent-matches-anaphor-speaker", CorefRules.AntecedentMatchesMentionSpeakerAnnotation(m2, m1, doc)); AddFeature(features, "discourse-you-PER0", m2.person == Dictionaries.Person.You && doc.docType == Document.DocType.Article && m2.headWord.Get(typeof(CoreAnnotations.SpeakerAnnotation)).Equals("PER0")); AddFeature(features, "speaker-match-i-i", m2.number == Dictionaries.Number.Singular && dictionaries.firstPersonPronouns.Contains(s1) && m1.number == Dictionaries.Number.Singular && dictionaries.firstPersonPronouns.Contains(s2) && CorefRules. EntitySameSpeaker(doc, m2, m1)); AddFeature(features, "speaker-match-speaker-i", m2.number == Dictionaries.Number.Singular && dictionaries.firstPersonPronouns.Contains(s2) && CorefRules.AntecedentIsMentionSpeaker(doc, m2, m1, dictionaries)); AddFeature(features, "speaker-match-i-speaker", m1.number == Dictionaries.Number.Singular && dictionaries.firstPersonPronouns.Contains(s1) && CorefRules.AntecedentIsMentionSpeaker(doc, m1, m2, dictionaries)); AddFeature(features, "speaker-match-you-you", dictionaries.secondPersonPronouns.Contains(s1) && dictionaries.secondPersonPronouns.Contains(s2) && CorefRules.EntitySameSpeaker(doc, m2, m1)); AddFeature(features, "discourse-between-two-person", ((m2.person == Dictionaries.Person.I && m1.person == Dictionaries.Person.You || (m2.person == Dictionaries.Person.You && m1.person == Dictionaries.Person.I)) && (m2.headWord.Get(typeof(CoreAnnotations.UtteranceAnnotation )) - m1.headWord.Get(typeof(CoreAnnotations.UtteranceAnnotation)) == 1) && doc.docType == Document.DocType.Conversation)); AddFeature(features, "incompatible-not-match", m1.person != Dictionaries.Person.I && m2.person != Dictionaries.Person.I && (CorefRules.AntecedentIsMentionSpeaker(doc, m1, m2, dictionaries) || CorefRules.AntecedentIsMentionSpeaker(doc, m2, m1 , dictionaries))); int utteranceDist = Math.Abs(m1.headWord.Get(typeof(CoreAnnotations.UtteranceAnnotation)) - m2.headWord.Get(typeof(CoreAnnotations.UtteranceAnnotation))); if (doc.docType != Document.DocType.Article && utteranceDist == 1 && !CorefRules.EntitySameSpeaker(doc, m2, m1)) { AddFeature(features, "speaker-mismatch-i-i", m1.person == Dictionaries.Person.I && m2.person == Dictionaries.Person.I); AddFeature(features, "speaker-mismatch-you-you", m1.person == Dictionaries.Person.You && m2.person == Dictionaries.Person.You); AddFeature(features, "speaker-mismatch-we-we", m1.person == Dictionaries.Person.We && m2.person == Dictionaries.Person.We); } // other dcoref features string firstWord1 = FirstWord(m1).Word().ToLower(); AddFeature(features, "indefinite-article-np", (m1.appositions == null && m1.predicateNominatives == null && (firstWord1.Equals("a") || firstWord1.Equals("an")))); AddFeature(features, "far-this", m2.LowercaseNormalizedSpanString().Equals("this") && Math.Abs(m2.sentNum - m1.sentNum) > 3); AddFeature(features, "per0-you-in-article", m2.person == Dictionaries.Person.You && doc.docType == Document.DocType.Article && m2.headWord.Get(typeof(CoreAnnotations.SpeakerAnnotation)).Equals("PER0")); AddFeature(features, "inside-in", m2.InsideIn(m1) || m1.InsideIn(m2)); AddFeature(features, "indefinite-determiners", dictionaries.indefinitePronouns.Contains(m1.originalSpan[0].Lemma()) || dictionaries.indefinitePronouns.Contains(m2.originalSpan[0].Lemma())); AddFeature(features, "entity-attributes-agree", CorefRules.EntityAttributesAgree(c2, c1)); AddFeature(features, "entity-token-distance", CorefRules.EntityTokenDistance(m2, m1)); AddFeature(features, "i-within-i", CorefRules.EntityIWithinI(m2, m1, dictionaries)); AddFeature(features, "exact-string-match", CorefRules.EntityExactStringMatch(c2, c1, dictionaries, doc.roleSet)); AddFeature(features, "entity-relaxed-heads-agree", CorefRules.EntityRelaxedHeadsAgreeBetweenMentions(c2, c1, m2, m1)); AddFeature(features, "is-acronym", CorefRules.EntityIsAcronym(doc, c2, c1)); AddFeature(features, "demonym", m2.IsDemonym(m1, dictionaries)); AddFeature(features, "incompatible-modifier", CorefRules.EntityHaveIncompatibleModifier(m2, m1)); AddFeature(features, "head-lemma-match", m1.headWord.Lemma().Equals(m2.headWord.Lemma())); AddFeature(features, "words-included", CorefRules.EntityWordsIncluded(c2, c1, m2, m1)); AddFeature(features, "extra-proper-noun", CorefRules.EntityHaveExtraProperNoun(m2, m1, new HashSet <string>())); AddFeature(features, "number-in-later-mentions", CorefRules.EntityNumberInLaterMention(m2, m1)); AddFeature(features, "sentence-context-incompatible", CorefRules.SentenceContextIncompatible(m2, m1, dictionaries)); // syntax features if (useConstituencyParse) { if (m1.sentNum == m2.sentNum) { int clauseCount = 0; Tree tree = m2.contextParseTree; Tree current = m2.mentionSubTree; while (true) { current = current.Ancestor(1, tree); if (current.Label().Value().StartsWith("S")) { clauseCount++; } if (current.Dominates(m1.mentionSubTree)) { break; } if (current.Label().Value().Equals("ROOT") || current.Ancestor(1, tree) == null) { break; } } features.IncrementCount("clause-count", clauseCount); features.IncrementCount("clause-count=" + Bin(clauseCount)); } if (RuleBasedCorefMentionFinder.IsPleonastic(m2, m2.contextParseTree) || RuleBasedCorefMentionFinder.IsPleonastic(m1, m1.contextParseTree)) { features.IncrementCount("pleonastic-it"); } if (MaximalNp(m1.mentionSubTree) == MaximalNp(m2.mentionSubTree)) { features.IncrementCount("same-maximal-np"); } bool m1Embedded = HeadEmbeddingLevel(m1.mentionSubTree, m1.headIndex - m1.startIndex) > 1; bool m2Embedded = HeadEmbeddingLevel(m2.mentionSubTree, m2.headIndex - m2.startIndex) > 1; features.IncrementCount("embedding=" + m1Embedded + "_" + m2Embedded); } return(features); }
/// <summary>Checks if two clusters are coreferent according to our sieve pass constraints</summary> /// <param name="document"/> /// <exception cref="System.Exception"/> public virtual bool Coreferent(Document document, CorefCluster mentionCluster, CorefCluster potentialAntecedent, Mention mention2, Mention ant, Dictionaries dict, ICollection <Mention> roleSet) { bool ret = false; Mention mention = mentionCluster.GetRepresentativeMention(); if (flags.UseIncompatibles) { // Check our list of incompatible mentions and don't cluster them together // Allows definite no's from previous sieves to propagate down if (document.IsIncompatible(mentionCluster, potentialAntecedent)) { return(false); } } if (flags.DoPronoun && Math.Abs(mention2.sentNum - ant.sentNum) > 3 && mention2.person != Dictionaries.Person.I && mention2.person != Dictionaries.Person.You) { return(false); } if (mention2.LowercaseNormalizedSpanString().Equals("this") && Math.Abs(mention2.sentNum - ant.sentNum) > 3) { return(false); } if (mention2.person == Dictionaries.Person.You && document.docType == Document.DocType.Article && mention2.headWord.Get(typeof(CoreAnnotations.SpeakerAnnotation)).Equals("PER0")) { return(false); } if (document.conllDoc != null) { if (ant.generic && ant.person == Dictionaries.Person.You) { return(false); } if (mention2.generic) { return(false); } } // chinese newswire contains coref nested NPs with shared headword Chen & Ng if (lang != Locale.Chinese || document.docInfo == null || !document.docInfo.GetOrDefault("DOC_ID", string.Empty).Contains("nw")) { if (mention2.InsideIn(ant) || ant.InsideIn(mention2)) { return(false); } } if (flags.UseSpeakermatch) { string mSpeaker = mention2.headWord.Get(typeof(CoreAnnotations.SpeakerAnnotation)); string aSpeaker = ant.headWord.Get(typeof(CoreAnnotations.SpeakerAnnotation)); // <I> from same speaker if (mention2.person == Dictionaries.Person.I && ant.person == Dictionaries.Person.I) { return(mSpeaker.Equals(aSpeaker)); } // <I> - speaker if ((mention2.person == Dictionaries.Person.I && mSpeaker.Equals(int.ToString(ant.mentionID))) || (ant.person == Dictionaries.Person.I && aSpeaker.Equals(int.ToString(mention2.mentionID)))) { return(true); } } if (flags.UseDiscoursematch) { string mString = mention.LowercaseNormalizedSpanString(); string antString = ant.LowercaseNormalizedSpanString(); // mention and ant both belong to the same speaker cluster if (mention.speakerInfo != null && mention.speakerInfo == ant.speakerInfo) { return(true); } // (I - I) in the same speaker's quotation. if (mention.number == Dictionaries.Number.Singular && dict.firstPersonPronouns.Contains(mString) && ant.number == Dictionaries.Number.Singular && dict.firstPersonPronouns.Contains(antString) && CorefRules.EntitySameSpeaker(document, mention, ant)) { return(true); } // (speaker - I) if ((mention.number == Dictionaries.Number.Singular && dict.firstPersonPronouns.Contains(mString)) && CorefRules.AntecedentIsMentionSpeaker(document, mention, ant, dict)) { if (mention.speakerInfo == null && ant.speakerInfo != null) { mention.speakerInfo = ant.speakerInfo; } return(true); } // (I - speaker) if ((ant.number == Dictionaries.Number.Singular && dict.firstPersonPronouns.Contains(antString)) && CorefRules.AntecedentIsMentionSpeaker(document, ant, mention, dict)) { if (ant.speakerInfo == null && mention.speakerInfo != null) { ant.speakerInfo = mention.speakerInfo; } return(true); } // Can be iffy if more than two speakers... but still should be okay most of the time if (dict.secondPersonPronouns.Contains(mString) && dict.secondPersonPronouns.Contains(antString) && CorefRules.EntitySameSpeaker(document, mention, ant)) { return(true); } // previous I - you or previous you - I in two person conversation if (((mention.person == Dictionaries.Person.I && ant.person == Dictionaries.Person.You || (mention.person == Dictionaries.Person.You && ant.person == Dictionaries.Person.I)) && (mention.headWord.Get(typeof(CoreAnnotations.UtteranceAnnotation )) - ant.headWord.Get(typeof(CoreAnnotations.UtteranceAnnotation)) == 1) && document.docType == Document.DocType.Conversation)) { return(true); } if (dict.reflexivePronouns.Contains(mention.headString) && CorefRules.EntitySubjectObject(mention, ant)) { return(true); } } if (!flags.UseExactstringmatch && !flags.UseRelaxedExactstringmatch && !flags.UseApposition && !flags.UseWordsInclusion) { foreach (Mention m in mentionCluster.GetCorefMentions()) { foreach (Mention a in potentialAntecedent.GetCorefMentions()) { // angelx - not sure about the logic here, disable (code was also refactored from original) // vv gabor - re-enabled code (seems to improve performance) vv if (m.person != Dictionaries.Person.I && a.person != Dictionaries.Person.I && (CorefRules.AntecedentIsMentionSpeaker(document, m, a, dict) || CorefRules.AntecedentIsMentionSpeaker(document, a, m, dict))) { document.AddIncompatible(m, a); return(false); } // ^^ end block of code in question ^^ int dist = Math.Abs(m.headWord.Get(typeof(CoreAnnotations.UtteranceAnnotation)) - a.headWord.Get(typeof(CoreAnnotations.UtteranceAnnotation))); if (document.docType != Document.DocType.Article && dist == 1 && !CorefRules.EntitySameSpeaker(document, m, a)) { string mSpeaker = document.speakers[m.headWord.Get(typeof(CoreAnnotations.UtteranceAnnotation))]; string aSpeaker = document.speakers[a.headWord.Get(typeof(CoreAnnotations.UtteranceAnnotation))]; if (m.person == Dictionaries.Person.I && a.person == Dictionaries.Person.I) { document.AddIncompatible(m, a); return(false); } if (m.person == Dictionaries.Person.You && a.person == Dictionaries.Person.You) { document.AddIncompatible(m, a); return(false); } // This is weak since we can refer to both speakers if (m.person == Dictionaries.Person.We && a.person == Dictionaries.Person.We) { document.AddIncompatible(m, a); return(false); } } } } if (document.docType == Document.DocType.Article) { foreach (Mention m_1 in mentionCluster.GetCorefMentions()) { foreach (Mention a in potentialAntecedent.GetCorefMentions()) { if (CorefRules.EntitySubjectObject(m_1, a)) { document.AddIncompatible(m_1, a); return(false); } } } } } // Incompatibility constraints - do before match checks if (flags.USE_iwithini && CorefRules.EntityIWithinI(mention, ant, dict)) { document.AddIncompatible(mention, ant); return(false); } // Match checks if (flags.UseExactstringmatch && CorefRules.EntityExactStringMatch(mention, ant, dict, roleSet)) { return(true); } // if(flags.USE_EXACTSTRINGMATCH && Rules.entityExactStringMatch(mentionCluster, potentialAntecedent, dict, roleSet)){ // return true; // } if (flags.UseNameMatch && CheckEntityMatch(document, mentionCluster, potentialAntecedent, dict, roleSet)) { ret = true; } if (flags.UseRelaxedExactstringmatch && CorefRules.EntityRelaxedExactStringMatch(mentionCluster, potentialAntecedent, mention, ant, dict, roleSet)) { return(true); } if (flags.UseApposition && CorefRules.EntityIsApposition(mentionCluster, potentialAntecedent, mention, ant)) { return(true); } if (flags.UsePredicatenominatives && CorefRules.EntityIsPredicateNominatives(mentionCluster, potentialAntecedent, mention, ant)) { return(true); } if (flags.UseAcronym && CorefRules.EntityIsAcronym(document, mentionCluster, potentialAntecedent)) { return(true); } if (flags.UseRelativepronoun && CorefRules.EntityIsRelativePronoun(mention, ant)) { return(true); } if (flags.UseDemonym && mention.IsDemonym(ant, dict)) { return(true); } if (flags.UseRoleapposition) { if (lang == Locale.Chinese) { ret = false; } else { if (CorefRules.EntityIsRoleAppositive(mentionCluster, potentialAntecedent, mention, ant, dict)) { ret = true; } } } if (flags.UseInclusionHeadmatch && CorefRules.EntityHeadsAgree(mentionCluster, potentialAntecedent, mention, ant, dict)) { ret = true; } if (flags.UseRelaxedHeadmatch && CorefRules.EntityRelaxedHeadsAgreeBetweenMentions(mentionCluster, potentialAntecedent, mention, ant)) { ret = true; } if (flags.UseWordsInclusion && ret && !CorefRules.EntityWordsIncluded(mentionCluster, potentialAntecedent, mention, ant)) { return(false); } if (flags.UseIncompatibleModifier && ret && CorefRules.EntityHaveIncompatibleModifier(mentionCluster, potentialAntecedent)) { return(false); } if (flags.UseProperheadAtLast && ret && !CorefRules.EntitySameProperHeadLastWord(mentionCluster, potentialAntecedent, mention, ant)) { return(false); } if (flags.UseAttributesAgree && !CorefRules.EntityAttributesAgree(mentionCluster, potentialAntecedent)) { return(false); } if (flags.UseDifferentLocation && CorefRules.EntityHaveDifferentLocation(mention, ant, dict)) { if (flags.UseProperheadAtLast && ret && mention.goldCorefClusterID != ant.goldCorefClusterID) { } return(false); } if (flags.UseNumberInMention && CorefRules.EntityNumberInLaterMention(mention, ant)) { if (flags.UseProperheadAtLast && ret && mention.goldCorefClusterID != ant.goldCorefClusterID) { } return(false); } if (flags.UseDistance && CorefRules.EntityTokenDistance(mention2, ant)) { return(false); } if (flags.UseCorefDict) { // Head match if (ant.headWord.Lemma().Equals(mention2.headWord.Lemma())) { return(false); } // Constraint: ignore pairs commonNoun - properNoun if (ant.mentionType != Dictionaries.MentionType.Proper && (mention2.headWord.Get(typeof(CoreAnnotations.PartOfSpeechAnnotation)).StartsWith("NNP") || !Sharpen.Runtime.Substring(mention2.headWord.Word(), 1).Equals(Sharpen.Runtime.Substring(mention2 .headWord.Word(), 1).ToLower()))) { return(false); } // Constraint: ignore plurals if (ant.headWord.Get(typeof(CoreAnnotations.PartOfSpeechAnnotation)).Equals("NNS") && mention2.headWord.Get(typeof(CoreAnnotations.PartOfSpeechAnnotation)).Equals("NNS")) { return(false); } // Constraint: ignore mentions with indefinite determiners if (dict.indefinitePronouns.Contains(ant.originalSpan[0].Lemma()) || dict.indefinitePronouns.Contains(mention2.originalSpan[0].Lemma())) { return(false); } // Constraint: ignore coordinated mentions if (ant.IsCoordinated() || mention2.IsCoordinated()) { return(false); } // Constraint: context incompatibility if (CorefRules.ContextIncompatible(mention2, ant, dict)) { return(false); } // Constraint: sentence context incompatibility when the mentions are common nouns if (CorefRules.SentenceContextIncompatible(mention2, ant, dict)) { return(false); } if (CorefRules.EntityClusterAllCorefDictionary(mentionCluster, potentialAntecedent, dict, 1, 8)) { return(true); } if (CorefRules.EntityCorefDictionary(mention, ant, dict, 2, 2)) { return(true); } if (CorefRules.EntityCorefDictionary(mention, ant, dict, 3, 2)) { return(true); } if (CorefRules.EntityCorefDictionary(mention, ant, dict, 4, 2)) { return(true); } } if (flags.DoPronoun) { Mention m; if (mention.predicateNominatives != null && mention.predicateNominatives.Contains(mention2)) { m = mention2; } else { m = mention; } bool mIsPronoun = (m.IsPronominal() || dict.allPronouns.Contains(m.ToString())); bool attrAgree = HybridCorefProperties.UseDefaultPronounAgreement(props) ? CorefRules.EntityAttributesAgree(mentionCluster, potentialAntecedent) : CorefRules.EntityAttributesAgree(mentionCluster, potentialAntecedent, lang); if (mIsPronoun && attrAgree) { if (dict.demonymSet.Contains(ant.LowercaseNormalizedSpanString()) && dict.notOrganizationPRP.Contains(m.headString)) { document.AddIncompatible(m, ant); return(false); } if (CorefRules.EntityPersonDisagree(document, mentionCluster, potentialAntecedent, dict)) { document.AddIncompatible(m, ant); return(false); } return(true); } } if (flags.UseChineseHeadMatch) { if (mention2.headWord == ant.headWord && mention2.InsideIn(ant)) { if (!document.IsCoref(mention2, ant)) { } // TODO: exclude conjunction // log.info("error in chinese head match: "+mention2.spanToString()+"\t"+ant.spanToString()); return(true); } } return(ret); }