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: Macroevolution is more than repeated rounds of microevolution. 
Sentence2: evolution over geologic time above the level of the species is more than repeated rounds of microevolution.

Answer: microevolution


Question: Sentence1: Viruses are usually considered to be nonliving. 
Sentence2: Viruses are usually acquired from contact with infected animals.

Answer: Viruses


Question: Sentence1: Hemoglobin transports oxygen in blood. 
Sentence2: breathing is when a gill converts from oxygen in water into Hemoglobin.

Answer:
Hemoglobin


