1. An method of defining a lexical database ontology comprising: accessing a lexical database comprising a plurality of concepts individually including a plurality of different words; accessing a corpus of documents; identifying occurrences of the words in the documents of the corpus; counting a plurality of frequency counts for individual ones of the concepts, wherein the counting includes incrementing the frequency counts of the concepts responsive to the identifying of the occurrences of the words of the respective concepts in the documents; analyzing the frequency counts; and selecting a plurality of the concepts as event classes of a lexical database ontology responsive to the analyzing, wherein the event classes of the lexical database ontology are usable to disambiguate textual content.