“…Various approaches to combine spatial image representations and sequential question representations have been proposed [6], [11], [30], [66], [99], [101], [106]. More specifically to the video domain (VideoQA), spatio-temporal video representations in terms of motion and appearance have been used in [23], [28], [32], [38], [41], [42], [43], [50], [51], [52], [58], [72], [79], [100], [102], [109], [114], [122].…”