QUESTION: Generate a question with a factual answer?

ANS: When did enantiornithes become extinct?

QUESTION: Generate a question with a factual answer?

ANS: What plan of 1811 spread a grid of streets across Manhattan?

QUESTION: Generate a question with a factual answer?

ANS: What religion is predominant in the West and western South Slavs?

QUESTION: Generate a question with a factual answer?

ANS:
How much increase in land space did the filling of the borrow pits cause?