public ClauseSymbols(Sentence clause1, Sentence clause2) { SymbolClassifier classifier = new SymbolClassifier(); clause1Symbols = classifier.getSymbolsIn(clause1); clause1PositiveSymbols = classifier.getPositiveSymbolsIn(clause1); clause1NegativeSymbols = classifier.getNegativeSymbolsIn(clause1); clause2Symbols = classifier.getSymbolsIn(clause2); clause2PositiveSymbols = classifier.getPositiveSymbolsIn(clause2); clause2NegativeSymbols = classifier.getNegativeSymbolsIn(clause2); positiveInClause1NegativeInClause2 = SetOps.intersection( clause1PositiveSymbols, clause2NegativeSymbols); negativeInClause1PositiveInClause2 = SetOps.intersection( clause1NegativeSymbols, clause2PositiveSymbols); }