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: Nonmetal elements are far fewer in number. 
Sentence2: There are 17 nonmetals on the periodic table.

Answer: Nonmetal


Question: Sentence1: a thermometer is used to measure temperature. 
Sentence2: a thermometer is used to measure heat.

Answer: a


Question: Sentence1: electricity is used as an energy source by electrical devices. 
Sentence2: Electrical engineers work on power plants, computers, and other electrical devices.

Answer:
devices