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: Erosion of rock makes nutrients available. 
Sentence2: rain causes nutrients to be available.
[EX A]: nutrients

[EX Q]: Sentence1: nectar is used for attracting pollinators by plants. 
Sentence2: butterflies pollinate plants.
[EX A]: plants

[EX Q]: Sentence1: a barometer is used to measure air pressure. 
Sentence2: Air pressure is a measure of the weight of the air.
[EX A]:
air