WordNet is an advanced lexical ontology and thesaurus for the English language with many applications in information retrieval and Web information agents. Write a one page document about WordNet containing the following elements. (1) Your own description of WordNet. (2) What are the unique features of WordNet that distinguish it from other types of standard thesauri? And (3) what are some of the specific ways WordNet can be (or has been) used in the context of information retrieval?