/**
   * Realises the head noun of the noun phrase.
   *
   * @param phrase the <code>PhraseElement</code> representing this noun phrase.
   * @param parent the parent <code>SyntaxProcessor</code> that will do the realisation of the
   *     complementiser.
   * @param realisedElement the current realisation of the noun phrase.
   */
  private static void realiseHeadNoun(
      PhraseElement phrase, SyntaxProcessor parent, ListElement realisedElement) {
    NLGElement headElement = phrase.getHead();

    if (headElement != null) {
      headElement.setFeature(Feature.ELIDED, phrase.getFeature(Feature.ELIDED));
      headElement.setFeature(LexicalFeature.GENDER, phrase.getFeature(LexicalFeature.GENDER));
      headElement.setFeature(InternalFeature.ACRONYM, phrase.getFeature(InternalFeature.ACRONYM));
      headElement.setFeature(Feature.NUMBER, phrase.getFeature(Feature.NUMBER));
      headElement.setFeature(Feature.PERSON, phrase.getFeature(Feature.PERSON));
      headElement.setFeature(Feature.POSSESSIVE, phrase.getFeature(Feature.POSSESSIVE));
      headElement.setFeature(Feature.PASSIVE, phrase.getFeature(Feature.PASSIVE));
      NLGElement currentElement = parent.realise(headElement);
      currentElement.setFeature(InternalFeature.DISCOURSE_FUNCTION, DiscourseFunction.SUBJECT);
      realisedElement.addComponent(currentElement);
    }
  }
  /**
   * Realises the specifier of the noun phrase.
   *
   * @param phrase the <code>PhraseElement</code> representing this noun phrase.
   * @param parent the parent <code>SyntaxProcessor</code> that will do the realisation of the
   *     complementiser.
   * @param realisedElement the current realisation of the noun phrase.
   */
  private static void realiseSpecifier(
      PhraseElement phrase, SyntaxProcessor parent, ListElement realisedElement) {
    NLGElement specifierElement = phrase.getFeatureAsElement(InternalFeature.SPECIFIER);

    if (specifierElement != null
        && !phrase.getFeatureAsBoolean(InternalFeature.RAISED).booleanValue()
        && !phrase.getFeatureAsBoolean(Feature.ELIDED).booleanValue()) {

      if (!specifierElement.isA(LexicalCategory.PRONOUN)) {
        specifierElement.setFeature(Feature.NUMBER, phrase.getFeature(Feature.NUMBER));
      }

      NLGElement currentElement = parent.realise(specifierElement);

      if (currentElement != null) {
        currentElement.setFeature(InternalFeature.DISCOURSE_FUNCTION, DiscourseFunction.SPECIFIER);
        realisedElement.addComponent(currentElement);
      }
    }
  }