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

[EX Q]: The opening in the front of the eye is called pupil.
[EX A]: What is the opening in the front of the eye called?

[EX Q]: The right atrium of the heart receives the blood is pumped from veins of the systemic circuit.
[EX A]: What part of the heart receives the blood is pumped from veins of the systemic circuit?

[EX Q]: Ground tilting is caused by the buildup of stress in the rocks.
[EX A]:
What is caused by the buildup of stress in the rocks?