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: Absorption of nutrients occurs mainly in the small intestine. 
Sentence2: The small intestine is the main place where food absorption occurs.
[EX A]: intestine

[EX Q]: Sentence1: Plants exhibit phototropism, or growing toward a light source. 
Sentence2: Bamboos are vigorous, rugged plants.
[EX A]: Plants

[EX Q]: Sentence1: Sterilization kills all viable microorganisms. 
Sentence2: Sterilization can be used to extend the shelf life of that food.
[EX A]:
Sterilization