Before revision:  The recently released SemBleu metric (Song and Gildea, 2019) is based on the machine-translation metric Bleu (Papineni et al., 2002) , increasing computational efficiency by ablating a variable-alignment step and aiming at capturing more global graph properties.
After revision:  The recently released SemBleu metric (Song and Gildea, 2019) is based on the machine-translation metric Bleu (Papineni et al., 2002) and increases computational efficiency by ablating a variable-alignment step and aiming at capturing more global graph properties.