The functions g u,v are scalar gates which weight the importance of each edge. Gates are particularly useful when the graph is predicted BiRNN Baseline<cite> (Bastings et al., 2017)</cite> 23.3 +Sem 24.5 +Syn<cite> (Bastings et al., 2017)</cite> 23.9 +Syn + Sem 24.9 and thus may contain errors, i.e., wrong edges.