Model BLEU-1 BLEU-2 BLEU-3 BLEU-4 METEOR ROUGE-L L2A (Du et al., 2017) 43  (Paulus et al., 2018) 11.20-3.50-1.21-0.45-6.68-15.25-SUM ROUGE (Paulus et al., 2018) 11.94-3.   shown in Table 3, seven of our eight models outperform the two baselines, with GE DAS+QSS+ANSS being the best model on syntactic correctness and semantic correctness quality metrics, outperforming all the other models by a large margin.
model GE BLEU+QSS+ANSS generates highly relevant questions and is the best model on relevance metrics.