pdf dblp ATA2: A Question Answering System at NTCIR-13 QALab-3 Tao-Hsing Chang | Yu-Sheng Tsai | Chih-Li Tsai | Pei-Xuan Cai The 13th NTCIR Conference, Evaluation of Information Access Technologies, National Center of Sciences, Tokyo, Japan, December 5-8, 2017