TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Darwin believed in gradualism.

SOLUTION: Did darwin believe in punctuated equilibrium or gradualism?

PROBLEM: 40 m/s north of the following represents the velocity of a moving object.

SOLUTION: Which of the following represents the velocity of a moving object?

PROBLEM: Iron ions are critical for the formation of hemoglobin.

SOLUTION:
What is critical for the formation of hemoglobin?