When REG and linearization are applied on shallowSyn −re with gold shallow trees, the BLEU score is lower (60.57) as compared to the system that applies syntax and linearization on deepSyn +re , deep trees with gold REs (BLEU score of 63.9).
the BLEU r score, which generalizes over lexical RE mismatches, is higher for the REG→LIN components than for SYN→LIN.