Since computers have limited means of human-like perception, the latter approach is also very much suited to the automatic acquisition of world knowledge by a computer (see Hearst, 1992;Charniak and Berland, 1999;Etzioni et al., 2004;Völker et al., 2005;Almuhareb and Poesio, 2005;Cimiano and Wenderoth, 2007;Veale and Hao, 2007).
by using the web as a distributed text corpus (see Keller et al., 2002), a multitude of facts and beliefs can be extracted, for purposes ranging from questionanswering to ontology population.