What and Where: An Empirical Investigation of Pointing Gestures and Descriptions in Multimodal Referring Actions Albert Gatt author Patrizia Paggio author 2013-08 text Proceedings of the 14th European Workshop on Natural Language Generation Albert Gatt editor Horacio Saggion editor Association for Computational Linguistics Sofia, Bulgaria conference publication gatt-paggio-2013-empirical https://aclanthology.org/W13-2109/ 2013-08 82 91