11. The system of claim 10 , wherein the corpus is divided into categories of directory assistance listings, and wherein the language model generation component is configured to generate the language model counts attributable to the word based on an indicator of whether the word is descriptive of the category to which the listing that contains the word belongs.
11. The system of claim 10 , wherein the corpus is divided into categories of directory assistance listings, and wherein the language model generation component is configured to generate the language model counts attributable to the word based on an indicator of whether the word is descriptive of the category to which the listing that contains the word belongs. 12. The system of claim 11 , wherein the language model generation component is configured to generate, separately for words in each category in the corpus: the language model counts attributable to the word based on whether the word is likely to be omitted; the language model counts attributable to the word based on a characteristic indicative of how well the word operates to distinguish the listing that contains the word from other listings in the corpus; and the language model counts attributable to the word based on an indicator of whether the word is descriptive of the category to which it belongs.