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: Heat and temperature are the same. 
Sentence2: a thermometer is used to measure heat.
[EX A]: Heat

[EX Q]: Sentence1: if soil is permeable then water easily flows through that soil. 
Sentence2: if soil is permeable then h2o easily flows through the soil.
[EX A]: flows

[EX Q]: Sentence1: protein is used to repair cells by the human body. 
Sentence2: Wound healing requires protein.
[EX A]:
protein