instruction:
Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.
question:
'Forty Years On' is the title of the first West End play by which British playwright?
answer:
alan bennett


question:
Which of Jupiter's Moons is largest?
answer:
ganymede


question:
What was the first Elvis Presley single to reach number one in the UK?
answer:

all shook up