4. The method of claim 3 wherein clustering comprises: initializing clusters based on lexical items in the speech recognition results; assigning the speech recognition results to the initialized clusters; merging similar clusters; and re-assigning the speech recognition results to the clusters.
4. The method of claim 3 wherein clustering comprises: initializing clusters based on lexical items in the speech recognition results; assigning the speech recognition results to the initialized clusters; merging similar clusters; and re-assigning the speech recognition results to the clusters. 14. The method of claim 4 wherein merging comprises: merging clusters until a defined auxiliary function changes by a predetermined amount.