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: Crops are plants that are grown for food or other uses. 
Sentence2: insects destroy plants.
[EX A]: plants

[EX Q]: Sentence1: Muscles can only contract. 
Sentence2: Contraction is a type of movement.
[EX A]: contract

[EX Q]: Sentence1: Most amphibians breathe with gills as larvae and with lungs as adults. 
Sentence2: All frogs are amphibians.
[EX A]:
amphibians