Ezra Black Steven P. Abney D. Flickenger Claudia Gdaniec Ralph Grishman P. Harrison Donald Hindle Robert Ingria Frederick Jelinek Judith L. Klavans Mark Liberman Mitchell P. Marcus Salim Roukos Beatrice Santorini Tomek Strzalkowski A Procedure for Quantitatively Comparing the Syntactic Coverage of English Grammars. 1991 conf/naacl/1991 HLT http://acl.ldc.upenn.edu/H/H91/H91-1060.pdf db/conf/naacl/naacl1991.html#BlackAFGGHHIJKLMRSS91