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.
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Question: Sentence1: if a habitat can no longer support animals then those animals will move to another area. 
Sentence2: Each species of animal is unique.

Answer: animals


Question: Sentence1: Scientists still know relatively little about Archaea. 
Sentence2: scientists still know relatively little about non-bacterial prokaryotes.

Answer: Scientists


Question: Sentence1: Almost all physical characteristics are genetic traits, inherited from parents. 
Sentence2: Evolution is a change in the genetic traits of living things over time.

Answer:
genetic