In this section, we describe how we used the large ATH introduced in Section 3 in order to annotate a corpus drawn from more than 10,000 questions compiled from (1) existing annotated question corpora<cite> (Li and Roth, 2002)</cite> , (2) collections of questions mined from the web, and (3) questions submitted to LCC's FERRET question-answering system (Hickl et al., 2006a) .