Question: What is the question to: "Although there have been several hypotheses for its origin in the past, the current most widely accepted explanation is that the Moon formed from the debris left over after a giant impact between Earth and a Mars -sized body."? The topic is Moon.
Answer: "how was the moon formed?"

Question: What is the question to: "It currently (Year 2013) lies at 23 26 15.143 north of the Equator."? The topic is Tropic of cancer.
Answer: "what latitude is tropic of cancer?"

Question: What is the question to: "The Freedom of Information Act (FOIA) is a federal freedom of information law that allows for the full or partial disclosure of previously unreleased information and documents controlled by the United States government ."? The topic is Freedom of Information Act (United States).
Answer:
"what does the FOIA apply to?"