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:
What is the name of the actor who plays Harry Potter in all the films?
answer:
daniel radcliffe

question:
What is the name of the dog in the television series 'The Magic Roundabout'?
answer:
dougal