question: What is the answer: In which series does Kiefer Sutherland play CTU agent Jack Bauer?
answer: 24

question: What is the answer: The English city of Sheffield lies on which river?
answer: river sheaf

question: What is the answer: Usually made of plastic, which transparent instrument, in the shape of an arc or semi-circle, is used to measure angles on paper?
answer: protractor

question: What is the answer: "What substance is called ""black gold""?"
answer:
oil