Movie Review Data is also called MR Dataset, it is a popular sentiment classification dataset proposed by [Pang and Lee, 2005]. Each review belongs to positive or negative sentiment class and contains only one sentence.
Bo Pang and Lillian Lee. Seeing stars: Exploiting class relationships for sentiment categorization with respect to rating scales. In ACL, 2005.
How to download MR?
You can dowaload this dataset in here.