Complex sentence: "Til It Happens to You" is a song produced and performed by American singer Lady Gaga, co-written by her and Diane Warren for the 2015 documentary film, "The Hunting Ground", which deals with campus rape in the United States.
Split into simpler sentences: Til It Happens to You is a song produced and performed by American singer Lady Gaga. She co-wrote the song with Diane Warren for the 2015 documentary film "The Hunting Ground", which deals with campus rape in the United States.