For the dataset used in the Style-Transfer part: The GYAFC corpus was created using the Yahoo Answers corpus: L6 - Yahoo! Answers Comprehensive Questions and Answers version 1.0. This Yahoo Answers corpus can be requested free of charge for research purposes. Access to the GYAFC dataset will require users to first gain access to this Yahoo Answers corpus.
Once you have gained access to the L6 corpus, please forward the acknowledgment to Joel Tetreault (tetreaul@gmail.com), along with your affiliation and a short description of how you will be using the data, and then they will provide access to their GYAFC corpus.