Generate a question with a factual answer.
Generated: What are in the area?

Generate a question with a factual answer.
Generated: What was the name of Pu Songling's collection of short stories?

Generate a question with a factual answer.
Generated: In what year did Lodygin demonstrate a lamp at the World's Fair?

Generate a question with a factual answer.
Generated: The Expansion of Germany by the Catholic Church into the areas of the Slavs and balts is know as what?