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: Bryophytes occupy niches in moist habitats. 
Sentence2: Animals and plants that live in the same place and share resources form a community biome niche .
[A]: niches


[Q]: Sentence1: the emission of sulfur dioxide causes acid rain. 
Sentence2: Sulfur dioxide emissions causes soil nutrients to be leached away.
[A]: dioxide


[Q]: Sentence1: Advantages and disadvantages of sexual as opposed to asexual means of reproduction. 
Sentence2: Alternation of generations allows for using the most advantageous type of reproduction.
[A]:
Advantages