/// <summary>
/// Transforms t if it contains an UCP, it will change the UCP tag
/// into the phrasal tag of the first word of the UCP
/// (UCP (JJ electronic) (, ,) (NN computer) (CC and) (NN building))
/// will become
/// (ADJP (JJ electronic) (, ,) (NN computer) (CC and) (NN building))
/// </summary>
/// <param name="t">a tree to be transformed</param>
/// <returns>t transformed</returns>
public static Tree UcpTransform(Tree t)
{
if (t == null)
{
return(null);
}
return(Tsurgeon.ProcessPattern(UcpRenameTregex, UcpRenameTsurgeon, t));
}
private static Tree RearrangeNowThat(Tree t)
{
if (t == null)
{
return(t);
}
return(Tsurgeon.ProcessPattern(RearrangeNowThatTregex, RearrangeNowThatTsurgeon, t));
}
private static Tree CombineConjp(Tree t)
{
if (t == null)
{
return(null);
}
return(Tsurgeon.ProcessPattern(FindFlatConjpTregex, AddConjpTsurgeon, t));
}
/// <summary>
/// For certain phrases, we change the SBAR to a PP to get prep/pcomp
/// dependencies. For example, in "The day after the airline was
/// planning...", we want prep(day, after) and pcomp(after,
/// planning). If "after the airline was planning" was parsed as an
/// SBAR, either by the parser or in the treebank, we fix that here.
/// </summary>
private static Tree ChangeSbarToPp(Tree t)
{
if (t == null)
{
return(null);
}
return(Tsurgeon.ProcessPattern(ChangeSbarToPpTregex, ChangeSbarToPpTsurgeon, t));
}
/// <summary>
/// Transforms t if it contains one of the following QP structure:
/// <ul>
/// <li> NP (QP ...) (QP (CC and/or) ...)</li>
/// <li> QP (RB IN CD|DT ...) well over, more than</li>
/// <li> QP (JJR IN CD|DT ...) fewer than</li>
/// <li> QP (IN JJS CD|DT ...) at least</li>
/// <li> QP (... CC ...) between 5 and 10</li>
/// </ul>
/// </summary>
/// <param name="t">a tree to be transformed</param>
/// <returns>t transformed</returns>
public static Tree QpTransform(Tree t)
{
t = Tsurgeon.ProcessPattern(FlattenNpOverQpTregex, FlattenNpOverQpTsurgeon, t);
t = Tsurgeon.ProcessPattern(MultiwordXsTregex, MultiwordXsTsurgeon, t);
t = Tsurgeon.ProcessPattern(SplitCcTregex, SplitCcTsurgeon, t);
t = Tsurgeon.ProcessPattern(SplitMoneyTregex, SplitMoneyTsurgeon, t);
return(t);
}
private static Tree MoveRb(Tree t)
{
if (t == null)
{
return(null);
}
foreach (TregexPattern pattern in MoveRbTregex)
{
t = Tsurgeon.ProcessPattern(pattern, MoveRbTsurgeon, t);
}
return(t);
}
/// <summary>
/// Removes the SQ structure under a WHNP question, such as "Who am I
/// to judge?". We do this so that it is easier to pick out the head
/// and then easier to connect that head to all of the other words in
/// the question in this situation. In the specific case of making
/// the copula head, we don't do this so that the existing headfinder
/// code can easily find the "am" or other copula verb.
/// </summary>
public Tree SqFlatten(Tree t)
{
if (headFinder != null && (headFinder is ICopulaHeadFinder))
{
if (((ICopulaHeadFinder)headFinder).MakesCopulaHead())
{
return(t);
}
}
if (t == null)
{
return(null);
}
return(Tsurgeon.ProcessPattern(FlattenSqTregex, FlattenSqTsurgeon, t));
}
public static Tree RemoveXOverX(Tree t)
{
return(Tsurgeon.ProcessPattern(RemoveXOverXTregex, RemoveXOverXTsurgeon, t));
}
protected static Tree StripEmptyNode(Tree t)
{
return(Tsurgeon.ProcessPattern(MatchPattern, Operation, t));
}