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.

[EX Q]: Sentence1: Nitrogen is found in proteins, nucleic acids, and chlorophyll. 
Sentence2: Life without protein is impossible.
[EX A]: proteins

[EX Q]: Sentence1: Energy is the fuel for chemical reactions which run the various systems of the body. 
Sentence2: running requires fuel for chemical reactions which run the various systems of the body.
[EX A]: body

[EX Q]: Sentence1: a speedometer is used for giving a driver feedback on the speed of their vehicle. 
Sentence2: a speedometer measures the rate of travel.
[EX A]:
speedometer