QUESTION: Generate a question with a factual answer?

ANS: How many square feet of office space did Houston have in Uptown in 2002?

QUESTION: Generate a question with a factual answer?

ANS: Who killed innocent civilians in the Nanking Massacre?

QUESTION: Generate a question with a factual answer?

ANS: What does Teheran, Isfahan, Mashhad, and Shiraz have in common?

QUESTION: Generate a question with a factual answer?

ANS:
What did large herds of bison attract?