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:
'La donna e mobile' comes from which Verdi opera?
answer:
rigoletto


question:
Who was the main singing star in the musical Half a Sixpence?
answer:
tommy steele


question:
What spy did Michael Caine play in three films?
answer:

harry palmer