Generate an overlapping word between the given two sentences. When you find the overlapping words, they don't have to match exactly, e.g., "survival" and "survive" are valid overlapping words. Little words like "the" or "of" don't count! You must generate significant words which are not the stop words.

[Q]: Sentence1: Ozone depletion results in higher levels of UV radiation reaching Earth.
Sentence2: less ozone means more ultraviolet light.
[A]: Ozone

[Q]: Sentence1: Methane gas is a produced by rotting compost, trash, and human waste.
Sentence2: Methane gas can be produced by Slime molds.
[A]: Methane

[Q]: Sentence1: Marine species live mainly in shallow coastal waters.
Sentence2: Seahorses are marine species.
[A]:
Marine