Peter Clark author Phil Harrison author John Thompson author William Murray author Jerry Hobbs author Christiane Fellbaum author 2007-06 text Satoshi Sekine editor Kentaro Inui editor Ido Dagan editor Bill Dolan editor Danilo Giampiccolo editor Bernardo Magnini editor Association for Computational Linguistics Prague conference publication clark-etal-2007-role https://aclanthology.org/W07-1409/ 2007-06 54 59