Enhancing Active Learning for Semantic Role Labeling via Compressed Dependency Trees Chenhua Chen author Alexis Palmer author Caroline Sporleder author 2011-11 text Proceedings of 5th International Joint Conference on Natural Language Processing Haifeng Wang editor David Yarowsky editor Asian Federation of Natural Language Processing Chiang Mai, Thailand conference publication chen-etal-2011-enhancing https://aclanthology.org/I11-1021/ 2011-11 183 191