We use 3 baselines: (i) our implementation of<cite> (Watanabe et al., 2006)</cite> : LR-Hiero with beam search (LR-Hiero) and (ii) LR-Hiero with cube pruning (Siahbani et al., 2013) : (LR-Hiero+CP); and (iii) Kriya, an open-source implementation of Hiero in Python, which performs comparably to other open-source Hiero systems (Sankaran et al., 2012) .