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: Climate refers to weather over a long period of time. 
Sentence2: weather is generally described in terms of temperature and moisture.

Answer: long


Question: Sentence1: Enveloped viruses make their own membranes. 
Sentence2: Some viruses make their own membranes.

Answer: make


Question: Sentence1: Organisms cluster around hydrothermal vents in the ocean floor. 
Sentence2: organisms on the ocean floor are unique.

Answer:
Organisms