Q: What was the occupation of Otto Klemperer?
What is the answer?

A: conductor

Q: Which 19th century French physicist erected a pendulum 200 feet high in the Pantheon in Paris to demonstrate the earth's rotation?
What is the answer?

A: jean foucault

Q: What was the title of Gordon Ramsay's 2006 autobiography?
What is the answer?

A: humble pie

Q: Which chemical compound is responsible for the 'furring' on the inside of a kettle?
What is the answer?

A:
calcium carbonate