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: Protein Protein is needed for tissue maintenance and repair. 
Sentence2: protein repairs cells.
[A]: Protein


[Q]: Sentence1: Climate Forests stabilize climate. 
Sentence2: forests stabilize what is generally described in terms of temperature and moisture.
[A]: Forests


[Q]: Sentence1: the movement of tectonic plates causes volcanic eruptions. 
Sentence2: The San Andreas is a "transform fault" that marks the boundary between two tectonic plates --  the North American and the Pacific.
[A]:
plates