Enhancing PIO Element Detection in Medical Text Using Contextualized Embedding Hichem Mezaoui author Isuru Gunasekara author Aleksandr Gontcharov author 2019-08 text Proceedings of the 18th BioNLP Workshop and Shared Task Dina Demner-Fushman editor Kevin Bretonnel Cohen editor Sophia Ananiadou editor Junichi Tsujii editor Association for Computational Linguistics Florence, Italy conference publication mezaoui-etal-2019-enhancing 10.18653/v1/W19-5023 https://aclanthology.org/W19-5023/ 2019-08 217 222