Question: What city held the 1956 Summer Olympics where Robert O'Brien competed in sprint canoe?
Sentence (from "1956 Summer Olympics"): The 1956 Summer Olympics, officially known as the Games of the XVI Olympiad, were an international multi-sport event which was held in Melbourne, Victoria, Australia, in 1956, apart from the equestrian events, which were held five months earlier in Stockholm.
Relevant evidence: Yes