TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Sexually do invertebrates reproduce.

SOLUTION: How do invertebrates reproduce?

PROBLEM: Carried through body happens if cancer cells enter the blood stream.

SOLUTION: What happens if cancer cells enter the blood stream?

PROBLEM: Humans can see in three dimensions.

SOLUTION:
How many dimensions can humans see in?