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.

[EX Q]: Category: ENTERTAINMENT HISTORY 
Clue: Originally known as the Missouri Rockets, they performed at the opening of an East Coast theatre in 1931
[EX A]: the rockettes

[EX Q]: Category: BEATLES MUSIC 
Clue: Chauffeur Alf Bicknell was the inspiration for this 1965 song
[EX A]: \"drive my car\"

[EX Q]: Category: SCIENCE HISTORY 
Clue: Announced by Ole Romer in 1676, the first measurement of this was 140,000 miles per second
[EX A]:
the speed of light