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

[Q]: Mercury Mercury is the 1st planet to the sun.
[A]: Mercury is always closer to the sun than it is to earth.

[Q]: From the focus of an earthquake, the two types of body waves (P and S), and two types of surface waves (Love and Rayleigh, which are S-waves trapped near the surface) radiate in all directions.
[A]: There are two types of surface waves.

[Q]: About 20 percent of the world's population lack access to safe drinking water, and 50 percent have no access to a sanitation system.
[A]:
At least 20 percent of the world's people do not have a ready supply of clean drinking water.