QUESTION: Generate a question with a factual answer?

ANS: How many men were in Napoleon's army when the battle began?

QUESTION: Generate a question with a factual answer?

ANS: Who was one of the first Greeks to adopt a humanistic outlook?

QUESTION: Generate a question with a factual answer?

ANS: What area holds the largest collection of plum blossoms in all of China?

QUESTION: Generate a question with a factual answer?

ANS:
What do phosphor-based LEDs luminous efficacies depend on?