Another problem that could be formulated is one in which the output summary is generated from multiple tables as proposed in a recent challenge (Wiseman et al., 2017) (this setting is out of the scope of this paper).
in addition to the standard BLEU (sBleu) (Papineni et al., 2002), a customized BLEU (cBleu) (Mei et al., 2016) has also been reported.