Given a scientific question, generate a correct answer to it.

Ex Input:
Orbiting at a fairly typical 370 kilometers, the international space station is an example of what?

Ex Output:
manmade satellite

Ex Input:
Shielding should be used when receiving x-rays to limit exposure to what potentially harmful form of energy?

Ex Output:
radiation

Ex Input:
What is given off from plants and taken in by animals?

Ex Output:
oxygen