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Stanford CoreNLP provides a set of natural language analysis tools which can take raw English language text input and give the base forms of words, their parts of speech, whether they are names of companies, people, etc., normalize dates, times, and numeric quantities, mark up the structure of sentences in terms of phrases and word dependencies, and indicate which noun phrases refer to the same entities. It provides the foundational building blocks for higher level text understanding applications.

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package edu.stanford.nlp.trees;

import java.util.function.Predicate;

public class EnglishGrammaticalStructureFactory implements GrammaticalStructureFactory {

  private final Predicate puncFilter;
  private final HeadFinder hf;

  public EnglishGrammaticalStructureFactory() {
    this(null, null);
  }

  public EnglishGrammaticalStructureFactory(Predicate puncFilter) {
    this(puncFilter, null);
  }

  public EnglishGrammaticalStructureFactory(Predicate puncFilter, HeadFinder hf) {
    this.puncFilter = puncFilter;
    this.hf = hf;
  }

  public EnglishGrammaticalStructure newGrammaticalStructure(Tree t) {
    if (puncFilter == null && hf == null) {
      return new EnglishGrammaticalStructure(t);
    } else if (hf == null) {
      return new EnglishGrammaticalStructure(t, puncFilter);
    } else {
      return new EnglishGrammaticalStructure(t, puncFilter, hf);
    }
  }
  
}