Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[EX Q]: Gastric emptying is regulated by both the stomach and the duodenum.
[EX A]: Gastric emptying is regulated by both the stomach and what other digestive structure?

[EX Q]: The name of film that polyester fibers form is mylar.
[EX A]: What is the name of film that polyester fibers form?

[EX Q]: Five many different types of taste neurons does the tongue contain.
[EX A]:
How many different types of taste neurons does the tongue contain?