Normalized Alignment of Dependency Trees for Detecting Textual Entailment
author:
Erwin Marsi,
Tilburg University
Description
In this paper, we investigate the usefulness of normalized alignment of dependency trees for entailment prediction. Overall, our approach yields an accuracy of 60% on the RTE2 test set, which is a significant improvement over the baseline. Results vary substantially across the different subsets, with a peak performance on the summarization data. We conclude that normalized alignment is useful for detecting textual entailment, but a robust approach will probably need to include additional sources of information.
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| Slides | |
| 0:01 | Normalized alignment of dependency trees for detecting textual entailment |
| 0:40 | Basic idea |
| 1:11 | Matching surface words alone is not sufficient... |
| 2:08 | Preprocessing |
| 2:27 | Syntactic Normalization |
| 2:44 | Auxiliary Reduction |
| 3:54 | Passive to Active Form |
| 4:09 | Copula Reduction |
| 4:20 | Alignment of Dependency Trees |
| 5:03 | Word Matching |
| 5:20 | Alignment example |
| 5:45 | Alignment example (cont’d) |
| 6:31 | Entailment prediction |
| 6:41 | Results |
| 6:54 | Problems |
| 7:44 | Discussion & Conclusion |
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