Positional Language Models for Clinical Information Retrieval Florian Boudin author Jian-Yun Nie author Martin Dawes author 2010-10 text Proceedings of the 2010 Conference on Empirical Methods in Natural Language Processing Hang Li editor Lluís Màrquez editor Association for Computational Linguistics Cambridge, MA conference publication boudin-etal-2010-positional https://aclanthology.org/D10-1011/ 2010-10 108 115