Generate a question with a factual answer.
Generated: Heian was Japan's capital for how many years?

Generate a question with a factual answer.
Generated: What pass was opened to the Banner Armies?

Generate a question with a factual answer.
Generated: Where did further protests take place?

Generate a question with a factual answer.
Generated: Is the environmental performance of CFLs better or worse than that of incandescents?