Co-reference via Pointing and Haptics in Multi-Modal Dialogues Lin Chen author Barbara Di Eugenio author 2012-06 text Proceedings of the 2012 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies Eric Fosler-Lussier editor Ellen Riloff editor Srinivas Bangalore editor Association for Computational Linguistics Montréal, Canada conference publication chen-di-eugenio-2012-co https://aclanthology.org/N12-1058/ 2012-06 523 527