As a consequence, in the last few years many diagnostic tasks and datasets have been proposed aiming at investigating the capabilities of such models in more detail to determine whether and how these models are capable of exploiting visual and/or linguistic information<cite> (Shekhar et al., 2017b</cite>; Johnson et al., 2017; Antol et al., 2015; Chen et al., 2015; Gao et al., 2015; Yu et al., 2015; Zhu et al., 2016) .