Exploration of the LTAG-Spinal Formalism and Treebank for Semantic Role Labeling Yudong Liu author Anoop Sarkar author 2009-08 text Proceedings of the 2009 Workshop on Grammar Engineering Across Frameworks (GEAF 2009) Tracy Holloway King editor Marianne Santaholma editor Association for Computational Linguistics Suntec, Singapore conference publication liu-sarkar-2009-exploration https://aclanthology.org/W09-2601/ 2009-08 1 9