15. A computer-readable storage device having instructions stored which, when executed by a computing device, cause the computing device to perform operations comprising: identifying words in optically-recognized text that are relevant to a recorded utterance based on references within the optically-recognized text to external data, to yield identified words; adding the identified words to a dynamic language model to generate a modified dynamic language model; and recognizing the recorded utterance using the modified dynamic language model, wherein the modified dynamic language model comprises a speech recognition model.
15. A computer-readable storage device having instructions stored which, when executed by a computing device, cause the computing device to perform operations comprising: identifying words in optically-recognized text that are relevant to a recorded utterance based on references within the optically-recognized text to external data, to yield identified words; adding the identified words to a dynamic language model to generate a modified dynamic language model; and recognizing the recorded utterance using the modified dynamic language model, wherein the modified dynamic language model comprises a speech recognition model. 19. The computer-readable storage device of claim 15 , wherein the recorded utterance is a portion of a spoken dialog.