Generating Referring Expressions in Open Domains Advaith Siddharthan author Ann Copestake author 2004-07 text Proceedings of the 42nd Annual Meeting of the Association for Computational Linguistics (ACL-04) Barcelona, Spain conference publication siddharthan-copestake-2004-generating 10.3115/1218955.1219007 https://aclanthology.org/P04-1052/ 2004-07 407 414