Video Captioning with Multi-Faceted Attention Xiang Long author Chuang Gan author Gerard de Melo author 2018 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal long-etal-2018-video 10.1162/tacl_a_00013 https://aclanthology.org/Q18-1013/ 2018 6 173 184