17. One or more non-transitory computer-readable media as recited in claim 15 , wherein the filtering comprises: determining, for individual words of individual phrases, a part-of-speech associated with the word; determining, based on the determined part-of-speech for the individual words, a part-of-speech combination of the individual phrases; and comparing the determined part-of-speech combination of the individual phrases with a part-of-speech list.
17. One or more non-transitory computer-readable media as recited in claim 15 , wherein the filtering comprises: determining, for individual words of individual phrases, a part-of-speech associated with the word; determining, based on the determined part-of-speech for the individual words, a part-of-speech combination of the individual phrases; and comparing the determined part-of-speech combination of the individual phrases with a part-of-speech list. 19. One or more non-transitory computer-readable media as recited in claim 17 , wherein the part-of-speech list comprises a list that specifies part-of-speech combinations for inclusion, and wherein the filtering further comprises filtering out phrases having determined part-of-speech combinations that do not appear on the list.