TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Endoscopes are used to explore the body through various orifices or minor incisions.

SOLUTION: Endoscopes are used to explore the body through various orifices or these?

PROBLEM: The metallic bond is responsible for the properties of metals.

SOLUTION: What is responsible for the properties of metals?

PROBLEM: Oxygen gas is given off by plants.

SOLUTION:
Which gas is given off by plants?