Neural Syntactic Preordering for Controlled Paraphrase Generation
Table 5: Comparison of different source reordering strategies. Our proposed approach outperforms baseline monotone and random rearrangement strategies.
['Ordering', 'oracle-ppl ↓', 'oracle-BLEU ↑']
Our proposed approach outperforms the baseline monotone and random reordering strategies. Furthermore, the Sow model’s oracle perplexity is close to that of the ground truth reordering’s perplexity, showing that the proposed approach is capable of generating a diverse set of rearrangements such that one of them often comes close to the target rearrangement. The comparatively high performance of the ground truth reorderings demonstrates that the positional embeddings are effective at guiding the Reap model’s generation.