Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for rating participants based on emotive feedback. In one aspect, a method includes identifying a first resource that includes a form associated with a particular action, identifying, using one or more computers, a second resource that references the form of the first resource, identifying anchor text in the second resource that references the form, and adding the identified anchor text to a set of phrases that is used for generating an action initiation grammar associated with the particular action.
Grammar extraction using anchor text