1NEGATION’S NOT SOLVED: RECONSIDERING NEGATION ANNOTATION AND EVALUATION
Stephen Wu, Timothy A. Miller, James J Masanz, Matt Coarr, Scott Halgrim, David Carrell, Cheryl Clark, Corresponding Stephen Wu · 2016
s (1,273 abstracts also in the GENIA corpus). Here, the scope of negation is specified as the maximum span within which the negation cue word could be applicable, and the scope cannot be disjoint from the cue word. This is in contrast to the negation annotations we explore; we do not explore scope annotations for two reasons: First, the lack of gold standard named entity mentions is an additional source of error that no other corpus would have, making the comparison unfair. Second, while such scope annotations overcome some recall issues for