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: decomposition increases the amount of nutrients in the soil. 
Sentence2: decomposition increases the amount of cations.
[EX A]: amount

[EX Q]: Sentence1: Runoff water is wasted water. 
Sentence2: Streams may start with wasted water.
[EX A]: wasted

[EX Q]: Sentence1: protein is used to repair cells by the human body. 
Sentence2: Biomolecules are used to repair cells by the human body.
[EX A]:
body