You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
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Question: Category: ENTERTAINMENT HISTORY 
Clue: Originally known as the Missouri Rockets, they performed at the opening of an East Coast theatre in 1931

Answer: the rockettes


Question: Category: OLYMPIC HOST COUNTRIES 
Clue: 3 of the 6 countries that have hosted both the summer & winter Olympics

Answer: united states, canada, france, germany, italy & japan


Question: Category: MEDICAL HISTORY 
Clue: In the 1850s he held the posts of demonstrator of & lecturer on anatomy at St. George's Hospital

Answer:
henry gray