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: cell division often causes growth. 
Sentence2: Cell division leads to reproduction.

Answer: cell


Question: Sentence1: Temperature Temperature is an measurement of the amount of heat. 
Sentence2: heat falls from the equator to the poles.

Answer:
heat