Corpus-based linguistics. The field of corpus-based linguistics, led by people like Ken Church and Eugene Charniak [Church and Hanks, 1989; Charniak, 1993], is beginning to change all of that. The recent textbook by Manning and Schütze [Manning and Schütze, 1999] provides an excellent introduction to this methodology. And for a long time Karen Sparck Jones has been exemplary in straddling these two approaches. Her work [Robertson and Sparck Jones, 1976; Sparck Jones, 1972; Sparck Jones, 1973; Sparck Jones and van Rijsbergen, 1976; Sparck Jones, 1979a; Sparck Jones, 1979b; Sparck Jones, 1986; Sparck Jones et. al., 1996; Sparck Jones and Willett, 1997] has consistently sparked from one side of Snow’s gulf to the other, making fundamental contributions to each.