When Are Tree Structures Necessary for Deep Learning of Representations? Jiwei Li author Thang Luong author Dan Jurafsky author Eduard Hovy author 2015-09 text Proceedings of the 2015 Conference on Empirical Methods in Natural Language Processing Lluís Màrquez editor Chris Callison-Burch editor Jian Su editor Association for Computational Linguistics Lisbon, Portugal conference publication li-etal-2015-tree 10.18653/v1/D15-1278 https://aclanthology.org/D15-1278/ 2015-09 2304 2314