2. The method of claim 1 wherein the constructing step includes the step of parsing the input string to discern its syntactic and semantic structure.
2. The method of claim 1 wherein the constructing step includes the step of parsing the input string to discern its syntactic and semantic structure. 3. The method of claim 2 wherein the identifying step includes the steps of: for each selected word of the input text: retrieving from a linguistic knowledge base one or more hypernyms of the selected word each having a similarity value characterizing the similarity in meaning of the hypernym to the selected word; and identifying any of the hypernyms whose similarity value exceeds a preestablished threshold.