| Abstract | Comparable to the state-of-the-art phrase-based system Moses, using packed forests in tree-to-tree translation results in a significant absolute improvement of 3.6 BLEU points over using l-best trees. |
| Experiments | The absolute improvement of 3.6 BLEU points (from 0.2021 to 02385) is statistically significant at p < 0.01 using the sign-test as described by Collins et al. |
| Introduction | Comparable to Moses, our forest-based tree-to-tree model achieves an absolute improvement of 3.6 BLEU points over conventional tree-based model. |