Question: The 1965 500cc United States Grand Prix was held at a racetrack opened in what year?
Sentence (from "Hideo Kanaya"): Hideo Kanaya (Shinjitai: 金谷 秀夫 , Hideo Kanaya , February 3, 1945 – December 19, 2013) was a Grand Prix motorcycle road racer from Japan.
Relevant evidence: No