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: intense heat has a negative impact on an organism. 
Sentence2: intense heat has a negative impact on plants.
[EX A]: heat

[EX Q]: Sentence1: Refrigerators are major users of electricity. 
Sentence2: Keeping food fresh for a long period of time requires a lot of electricity.
[EX A]: electricity

[EX Q]: Sentence1: Survival is to live, to live means hope. 
Sentence2: Population size influences the chances of a species living.
[EX A]:
live