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: Oil and gasoline are fossil fuels. 
Sentence2: lawn mowers convert fossil fuels into motion.
[EX A]: fossil

[EX Q]: Sentence1: cell division often causes growth. 
Sentence2: Mitosis is cell division.
[EX A]: cell

[EX Q]: Sentence1: Annelids have the amazing capacity to regrow segments that break off. 
Sentence2: Earthworms have the amazing capacity to regrow segments that break off.
[EX A]:
amazing