The Role of Implicit Argumentation in Nominal SRL

TitleThe Role of Implicit Argumentation in Nominal SRL
Publication TypeConference Paper
Year of Publication2009
AuthorsGerber, M, Chai, JY, Meyers, A
Conference NameNorth American Chapter of the Association for Computational Linguistics
Date Published06/2009
PublisherAssociation for Computational Linguistics
Conference LocationBoulder, Colorado, USA

Nominals frequently surface without overtly expressed arguments. In order to measure the potential benefit of nominal SRL for down- stream processes, such nominals must be ac- counted for. In this paper, we show that a state-of-the-art nominal SRL system with an overall argument F1 of 0.76 suffers a perfor- mance loss of more than 9% when nominals with implicit arguments are included in the evaluation. We then develop a system that takes implicit argumentation into account, im- proving overall performance by nearly 5%. Our results indicate that the degree of implicit argumentation varies widely across nominals, making automated detection of implicit argu- mentation an important step for nominal SRL.