Google recently released paraphrase dataset: **Paraphrase Adversaries from Word Scrambling (PAWS)**.

https://github.com/google-research-datasets/paws

This dataset is superior to many paraphrase datasets. As stated in their page,

>Existing paraphrase identification datasets lack sentence pairs that have high lexical overlap without being paraphrases. Models trained on such data fail to distinguish pairs like flights from New York to Florida and flights from Florida to New York. 

The dataset has two subsets, one based on Wikipedia and the other one based on the Quora Question Pairs (QQP) dataset.



There is an accompanying research paper for this dataset:

[PAWS: Paraphrase Adversaries from Word Scrambling][1]


  [1]: https://arxiv.org/abs/1904.01130