Task: Question Answering
Input (English): Passage: In February 2015, Gaga became engaged to Taylor Kinney. After Artpop's lukewarm response, Gaga began to redo her image and style. According to Billboard, this shift started with the release of Cheek to Cheek and the attention she received for her performance at the 87th Academy Awards, where she sang a medley of songs from The Sound of Music in a tribute to Julie Andrews. Considered one of her best performances by Billboard, it triggered more than 214,000 interactions per minute globally on Facebook. She and Diane Warren co-wrote the song "Til It Happens to You" for the documentary The Hunting Ground, which earned them the Satellite Award for Best Original Song and an Academy Award nomination in the same category. Gaga won Billboard Woman of the Year and Contemporary Icon Award at the 2015 Annual Songwriters Hall of Fame Awards.Gaga had spent much of her early life wanting to be an actress, and achieved her goal when she starred in American Horror Story: Hotel. Running from October 2015 to January 2016, Hotel is the fifth season of the television anthology horror series, American Horror Story, in which Gaga played a hotel owner named Elizabeth. At the 73rd Golden Globe Awards, Gaga received the Best Actress in a Miniseries or Television Film award for her work on the season. She appeared in Nick Knight's 2015 fashion film for Tom Ford's 2016 spring campaign and was guest editor for V fashion magazine's 99th issue in January 2016, which featured 16 different covers. She received Editor of the Year award at the Fashion Los Angeles Awards. 
Question: What is the name of the person who co-wrote the song "Til It Happens to You" with Diane Warren?
Output (English): Gaga.