These may include named entity taggers, WordNet, parsers, hand-tagged corpora, and ontology lists (Srihari and Li,00;Harabagiu et al.,01;Hovy et al.,01;Prager et al.,01).
at the recent TREC-10 QA evaluation (Voorhees,01), the winning system used just one resource: a fairly extensive list of surface patterns (Soubbotin and Soubbotin,01).