Semi-Markov Phrase-Based Monolingual Alignment
Xuchen Yao, Benjamin Van Durme, Chris Callison-Burch, Peter E. Clark · 2013
We introduce a novel discriminative model for phrase-based monolingual alignment using a semi-Markov CRF.Our model achieves stateof-the-art alignment accuracy on two phrasebased alignment datasets (RTE and paraphrase), while doing significantly better than other strong baselines in both non-identical alignment and phrase-only alignment.Additional experiments highlight the potential benefit of our alignment model to RTE, paraphrase identification and question answering, where even a naive application of our model's alignment score approaches the state of the art.