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: friction causes the temperature of an object to increase. 
Sentence2: internal combustion engines get hot.

A: temperature
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Q: Sentence1: Mitosis is cell division. 
Sentence2: mitosis often causes growth.

A: Mitosis
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Q: Sentence1: Pedigrees are useful tools for studying inheritance patterns. 
Sentence2: a map of the types of hemoglobin in the family tree is useful for studying inheritance patterns.

A:
inheritance
****