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: Contact with infected blood, contaminated needles. 
Sentence2: scraping oneself on an infected needle may cause infection.
[EX A]: infected

[EX Q]: Sentence1: a greenhouse is used to protect plants by keeping them warm. 
Sentence2: Flower size varies by plant.
[EX A]: plants

[EX Q]: Sentence1: Absorption of nutrients occurs mainly in the small intestine. 
Sentence2: nutrients are absorbed in the small intestine.
[EX A]:
nutrients