... extract the semantic structure of noun phrase queries, i.e., IHs, IMs and the semantic labels of IMs In particular, we investigate the use of transition, lexical, semantic and syntactic features The ... for semantic understanding of noun phrase queries Assuming that the intent class c ∈ C of a query is known, we cast the problem of extracting the semantic structure of the query into a joint segmentation/classification ... goal of this work is to identify the semantic labels of IMs, i.e., the attribute names they implicitly refer to We use Ac to denote the set of IM semantic labels for the intent class c Other...