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


question:
Whose opera La gazza ladra premiered in 1817?
answer:
gioachino rossini


question:
In which film would you first have come across the character of Marty McFly?
answer:

back to the future