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: Some trees are maples. 
Sentence2: planting maples has a positive impact on an ecosystem.

A: maples
****
Q: Sentence1: disease-causing microbes have a negative impact on the body. 
Sentence2: pathogens have a negative impact on the body.

A: body
****
Q: Sentence1: Cell division is how organisms grow and repair themselves. 
Sentence2: Mitosisis how organisms grow and repair themselves.

A:
grow
****