Special Issue Introduction: Semantic Role Labeling: An Introduction to the Special Issue Lluís Màrquez author Xavier Carreras author Kenneth C Litkowski author Suzanne Stevenson author 2008 text journal article Computational Linguistics continuing periodical academic journal marquez-etal-2008-special 10.1162/coli.2008.34.2.145 https://aclanthology.org/J08-2001/ 2008 34 2 145 159