273. Task 5. Keyphrase Extraction Based on Core Word Identification and Word Expansion You Ouyang author Wenjie Li author Renxian Zhang 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 ouyang-etal-2010-273 https://aclanthology.org/S10-1029/ 2010-07 142 145