TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: The right atrium of the heart receives the blood is pumped from veins of the systemic circuit.

SOLUTION: What part of the heart receives the blood is pumped from veins of the systemic circuit?

PROBLEM: Most protein antigens require signals from helper t cells (th2) to proceed to make antibody.

SOLUTION: Most protein antigens require signals from helper t cells (th2) to proceed to make what?

PROBLEM: The amount of product that may be produced by a reaction under specified conditions is called theoretical yield.

SOLUTION:
What is the amount of product that may be produced by a reaction under specified conditions called?