Question: Steven Spielberg, is an American director, producer, and screenwriter who is considered one of the founding pioneers of the New Hollywood era, who did he co-write the unfinished film Slipstream with?
Sentence (from "Slipstream (unfinished film)"): Slipstream is a film about bicycle racers directed and written by Steven Spielberg and Roger Ernest that went unfinished.
Relevant evidence: Yes