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Stanford Parser processes raw text in English, Chinese, German, Arabic, and French, and extracts constituency parse trees.

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package edu.stanford.nlp.ling;

/**
 * A LabeledWord object contains a word and its tag.
 * The value() of a TaggedWord is the Word.  The tag
 * is, and is a Label instead of a String
 */
public class LabeledWord extends Word {

  private Label tag;
  
  private static final String DIVIDER = "/";

  /**
   * Create a new TaggedWord.
   * It will have null for its content fields.
   */
  public LabeledWord() {
    super();
  }

  /**
   * Create a new TaggedWord.
   *
   * @param word The word, which will have a null tag
   */
  public LabeledWord(String word) {
    super(word);
  }

  /**
   * Create a new TaggedWord.
   *
   * @param word The word
   * @param tag  The tag
   */
  public LabeledWord(String word, Label tag) {
    super(word);
    this.tag = tag;
  }

  public LabeledWord(Label word, Label tag) {
    super(word);
    this.tag = tag;
  }

  public Label tag() {
    return tag;
  }

  public void setTag(Label tag) {
    this.tag = tag;
  }

  @Override
  public String toString() {
    return toString(DIVIDER);
  }

  public String toString(String divider) {
    return word() + divider + tag;
  }

  // extra class guarantees correct lazy loading (Bloch p.194)
  private static class LabelFactoryHolder {

    private LabelFactoryHolder() {}

    private static final LabelFactory lf = new TaggedWordFactory();

  }

  /**
   * Return a factory for this kind of label
   * (i.e., TaggedWord).
   * The factory returned is always the same one (a singleton).
   *
   * @return The label factory
   */
  @Override
  public LabelFactory labelFactory() {
    return LabelFactoryHolder.lf;
  }


  /**
   * Return a factory for this kind of label.
   *
   * @return The label factory
   */
  public static LabelFactory factory() {
    return LabelFactoryHolder.lf;
  }

  private static final long serialVersionUID = -7252006452127051085L;

}