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: Heterotrophs get food by eating other living things. 
Sentence2: fish eat other living things.
[EX A]: living

[EX Q]: Sentence1: Without light there is no sense of vision. 
Sentence2: Glass causes a sense of vision.
[EX A]: sense

[EX Q]: Sentence1: Earthworm burrows help aerate soil, which is also good for plants. 
Sentence2: Most species construct burrows.
[EX A]:
burrows