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

[EX Q]: The principle of superposition states that in an undisturbed stack of sedimentary strata the oldest layer is at the base and the youngest at the top.
[EX A]: The law of superposition is best described by: in undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.

[EX Q]: The heart becomes the first working organ in the human body, pumping by rhythmically opening and squeezing shut just 17 days after conception.
[EX A]: In humans, the heart is the first organ to form and become functional.

[EX Q]: A neutral N atom will have 5 valence electrons.
[EX A]:
Nitrogen has 5 valence electrons.