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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.util;

import java.io.Serializable;
import java.util.List;

import edu.stanford.nlp.util.logging.PrettyLoggable;
import edu.stanford.nlp.util.logging.PrettyLogger;
import edu.stanford.nlp.util.logging.Redwood.RedwoodChannels;

/**
 * A quadruple of ordered objects.
 * 
 * @author Spence Green
 *
 * @param 
 * @param 
 * @param 
 * @param 
 */
public class Quadruple implements Comparable>, Serializable, PrettyLoggable {

  private static final long serialVersionUID = 6295043666955910662L;
  
  public T1 first;
  public T2 second;
  public T3 third;
  public T4 fourth;

  public Quadruple(T1 first, T2 second, T3 third, T4 fourth) {
    this.first = first;
    this.second = second;
    this.third = third;
    this.fourth = fourth;
  }

  public T1 first() {
    return first;
  }

  public T2 second() {
    return second;
  }

  public T3 third() {
    return third;
  }

  public T4 fourth() {
    return fourth;
  }

  public void setFirst(T1 o) {
    first = o;
  }

  public void setSecond(T2 o) {
    second = o;
  }

  public void setThird(T3 o) {
    third = o;
  }
  
  public void setFourth(T4 o) {
    fourth = o;
  }

  @Override
  public boolean equals(Object o) {

    if (this == o) {
      return true;
    }

    if (!(o instanceof Quadruple)) {
      return false;
    }

    final Quadruple quadruple = ErasureUtils.uncheckedCast(o);

    if (first != null ? !first.equals(quadruple.first) : quadruple.first != null) {
      return false;
    }
    if (second != null ? !second.equals(quadruple.second) : quadruple.second != null) {
      return false;
    }
    if (third != null ? !third.equals(quadruple.third) : quadruple.third != null) {
      return false;
    }
    if (fourth != null ? !fourth.equals(quadruple.fourth) : quadruple.fourth != null) {
      return false;
    }

    return true;
  }

  @Override
  public int hashCode() {
    int result = 17;
    result = (first != null ? first.hashCode() : 0);
    result = 29 * result + (second != null ? second.hashCode() : 0);
    result = 29 * result + (third != null ? third.hashCode() : 0);
    result = 29 * result + (fourth != null ? fourth.hashCode() : 0);
    return result;
  }

  @Override
  public String toString() {
    return "(" + first + "," + second + "," + third + "," + fourth + ")";
  }

  /**
   * Returns a Quadruple constructed from T1, T2, T3, and T4. Convenience
   * method; the compiler will disambiguate the classes used for you so that you
   * don't have to write out potentially long class names.
   */
  public static  Quadruple makeQuadruple(T1 t1, T2 t2, T3 t3, T4 t4) {
    return new Quadruple<>(t1, t2, t3, t4);
  }

  public List