SJTULTLAB: Chunk Based Method for Keyphrase Extraction Letian Wang author Fang Li author 2010-07 text Proceedings of the 5th International Workshop on Semantic Evaluation Katrin Erk editor Carlo Strapparava editor Association for Computational Linguistics Uppsala, Sweden conference publication wang-li-2010-sjtultlab https://aclanthology.org/S10-1033/ 2010-07 158 161