You are given a sentence and your task is to generate another sentence that supports the given input.

Ex Input:
Gamma radiation is generated by radioactivity, the decay of radioactive (unstable) atoms both in Earth's crust and in the atmosphere, and in reactions caused by cosmic ray collisions with atmospheric constituents, as well as by the decay of elementary particles produced by these collisions.

Ex Output:
Radioactive atoms, nuclear explosions, and stars produce gamma rays

Ex Input:
A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

Ex Output:
All chemical reactions involve both reactants and products.

Ex Input:
A geyser indicates a spring or body of water that is heated by a geothermal source.

Ex Output:
Geysers are created when water is heated beneath the earth's surface.