Hence, having assumed that paraphrased pairs would share the same content and similar syntactic structures, we decide to choose the Microsoft Research Paraphrasing Corpus (Dolan et al., 2005) which contains 5,800 sentence pairs extracted from news sources on the web, along with human annotations indicating whether each pair captures a paraphrase/semantic equivalence relationship.
compared to the baseline, the contribution of syntactic structure is not significant to the overall performance.