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: Some trees are maples. 
Sentence2: planting maples has a positive impact on an ecosystem.
[EX A]: maples

[EX Q]: Sentence1: waxy leaves are used for storing water by some plants. 
Sentence2: waxy leaves are used for water conservation by some plants.
[EX A]: leaves

[EX Q]: Sentence1: First, bacteria are haploid. 
Sentence2: Fungi spores can develop into bacteria without being fertilized.
[EX A]:
bacteria