/// <summary>
/// Recursively builds a phrase structure tree from the given word.
/// </summary>
/// <param name="words">The array of words that make up the phrase</param>
/// <returns>The sentence structured into a hierarchical tree</returns>
public static Phrase buildTree(string InputPhrase, Lexicon d)
{
String[] words = processPhrase(InputPhrase);
Terminal[] terminals = new Terminal[words.Length];
for (int i = 0; i < words.Length; i++)
{
terminals[i] = new Terminal(words[i], d.lookupCategory(words[i]));
}
return merge(terminals);
}
