Input question: Which Shakespeare play introduced the phrase 'Shuffle off this mortal coil'?

Output answer: hamlet

Input question: The Tropics of Cancer and Capricorn are respectively (what number)-and-half degrees north and south of the Equator?

Output answer: 23

Input question: Which Football League club share the Keepmoat Stadium with the town's rugby league club?

Output answer: doncaster rovers

Input question: Which singer won the Eurovision Song Contest for Switzerland in 1988 and so launched her international career?

Output answer:
celine dion