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


[Q]: Sentence1: Results can be damaging or disastrous. 
Sentence2: Lack of immunization can be damaging or disastrous.
[A]: damaging


[Q]: Sentence1: hibernation is used for conserving energy by some animals. 
Sentence2: Animals hibernate in the winter.
[A]:
hibernation