Question: What city held the 1956 Summer Olympics where Robert O'Brien competed in sprint canoe?
Related documents: [0]  [DOC] Robert O'Brien (born June 6, 1933) is an American sprint canoer who competed in the late 1950s and early 1960s. Competing in two Summer Olympics, he earned his best finish of 11th in the K-1 10000 m event at Melbourne in 1956. [END] 
[1]  [DOC] 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. The 1956 Games were the first to be staged in the Southern Hemisphere and Oceania, as well as the first to be held outside Europe and North America. Melbourne is the southernmost city to host the games. Equestrian events could not be held in Australia due to quarantine regulations. This was the second Olympics not to be held entirely in one country, the first being the 1920 Summer Olympics, which Antwerp, Belgium, co-hosted with Amsterdam and Ostend. [END] 
Answer: 
Melbourne
Melbourne