KX: A Flexible System for Keyphrase eXtraction Emanuele Pianta author Sara Tonelli 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 pianta-tonelli-2010-kx https://aclanthology.org/S10-1036/ 2010-07 170 173