Yongqing Sun, Xu Chen, Chaoyu Li, Kiyohito Sawada, Takashi Hosono, Jun Zhu, Chengjuan Xie, Sixiang Huang, Lan Wang, Kai Hu, Qingsong Zhou, Chenqiang Gao, Jun Shimamura, Atsushi Sagata: NTT_CQUPT@TRECVID2019 ActEV: Activities in Extended Video. TRECVID 2019