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.

[Q]: Sentence1: wind is used for producing electricity. 
Sentence2: Wind is caused because of pressure differences in the atmosphere.
[A]: wind


[Q]: Sentence1: Digestion is the process of breaking down food into components the body can absorb. 
Sentence2: Saliva starts to break down the food.
[A]: breaking


[Q]: Sentence1: RNA is a small molecule that can squeeze through pores in the nuclear membrane. 
Sentence2: RNA is ribonucleic acid Like DNA, it is a nucleic acid.
[A]:
RNA