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.
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Question: Sentence1: wind is used for producing electricity. 
Sentence2: Winds are caused by pressure differences.

Answer: wind


Question: Sentence1: Veins generally carry deoxygenated blood. 
Sentence2: Blood carries blood cells.

Answer: blood


Question: Sentence1: Moles find prey mainly by using their sense of touch. 
Sentence2: Moles find prey mainly by using their ability to sense pressure.

Answer:
Moles