13. A system comprising: one or more computers and one or more storage devices storing instructions that are operable, when executed by one or more computers, cause the one or more computers to perform operations comprising: identifying, using one or more computers, a first web page that includes a form associated with a particular action; identifying, using one or more computers, a second web page comprising a hyperlink that references the form of the first web page and that comprises hyperlink text; identifying, using one or more computers, the hyperlink text associated with the hyperlink in the second web page that references the form; adding the identified hyperlink text to a set of phrases that is used for generating an action initiation grammar associated with the particular action; generating the action initiation grammar associated with the particular action using the set of phrases; receiving an utterance; obtaining, using an automated speech recognizer, a transcription of the utterance; determining that a least a portion or the transcription of the utterance included in the action initiation grammar associated with the particular action; and triggering the particular action to be performed in response to determining that at least portion of the transcription of the utterance is included in the action initiation grammar associated with the particular action.
13. A system comprising: one or more computers and one or more storage devices storing instructions that are operable, when executed by one or more computers, cause the one or more computers to perform operations comprising: identifying, using one or more computers, a first web page that includes a form associated with a particular action; identifying, using one or more computers, a second web page comprising a hyperlink that references the form of the first web page and that comprises hyperlink text; identifying, using one or more computers, the hyperlink text associated with the hyperlink in the second web page that references the form; adding the identified hyperlink text to a set of phrases that is used for generating an action initiation grammar associated with the particular action; generating the action initiation grammar associated with the particular action using the set of phrases; receiving an utterance; obtaining, using an automated speech recognizer, a transcription of the utterance; determining that a least a portion or the transcription of the utterance included in the action initiation grammar associated with the particular action; and triggering the particular action to be performed in response to determining that at least portion of the transcription of the utterance is included in the action initiation grammar associated with the particular action. 15. The system of claim 13 , wherein generating the action initiation grammar associated with the particular action further comprises: normalizing the hyperlink text; and generating the action initiation grammar based on the normalized hyperlink text.