TRAR: Routing the Attention Spans in Transformer
                for Visual Question Answering
       Yiyi Zhou12 , Tianhe Ren12 , Chaoyang Zhu12 , Xiaoshuai Sun12 *, Jianzhuang Liu3 ,
                Xinghao Ding2 , Mingliang Xu4 , Rongrong Ji12
     1
      Media Analytics and Computing Lab, School of Informatics, Xiamen University, China
               2
                School of Informatics, Xiamen University, China
         3
          Noah’s Ark Lab, Huawei Technologies 4 Zhengzhou Univers ...