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: After a seed is planted it is watered. 
Sentence2: seeds need water.
[EX A]: seed

[EX Q]: Sentence1: seat belts are used for preventing injuries to passengers in cars. 
Sentence2: Car accidents are a leading cause of death for children today.
[EX A]:
cars