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

[EX Q]: Superior sagittal sinus is the largest of the sinuses.
[EX A]: What is the largest of the sinuses?

[EX Q]: In paragraph 2, they had been untouched for centuries does the phrase à¥ˆ€œfrozen in timeà¥ˆ€ suggest about the figures.
[EX A]: In paragraph 2, what does the phrase à¥ˆ€œfrozen in timeà¥ˆ€ suggest about the figures?

[EX Q]: Digestion begins in the gastrovascular cavity.
[EX A]:
Where does digestion begin?