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 consistency, answers should be in all lower cased letters.
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Question: Category: WHO WAS THE PRESIDENT WHEN... 
Clue: ...the U.S. last won Winter Olympic men's ice hockey gold

Answer: jimmy carter


Question: Category: POP MUSIC 
Clue: In 1989, Roger Daltrey, Pete Townshend & John Entwistle reunited as this group for an American tour

Answer: the who


Question: Category: EUROPA, EUROPA 
Clue: This nation's city of Rostov-on-Don grew up around a fortress built there in 1761

Answer:
russia