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

Answer: the who


Question: Category: ELTON JOHN 
Clue: In 1997 Elton John recorded a new version of this song as a tribute to Princess Diana

Answer: "candle in the wind"


Question: Category: SCIENCE 
Clue: Drumlins are elongated, elliptical hills formed at the edges of these moving ice masses

Answer:
glaciers