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: Carbon cycles quickly between organisms and the atmosphere. 
Sentence2: the atmosphere is essential to all living organisms.
[EX A]: organisms

[EX Q]: Sentence1: a flower 's purpose is to produce seeds. 
Sentence2: Every job has meaning and purpose.
[EX A]: purpose

[EX Q]: Sentence1: a plant requires nutrients to grow. 
Sentence2: Plants require potash to grow.
[EX A]:
plant