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: Viruses contain DNA but not much else. 
Sentence2: viruses contain encoded information but not much else.

Answer: Viruses


Question: Sentence1: All photos are digital images. 
Sentence2: satellites are used to take photos from space.

Answer: photos


Question: Sentence1: Animals can communicate with sounds, chemicals, or visual cues. 
Sentence2: cows can communicate with sounds, chemicals or visual cues.

Answer:
chemicals