instruction:
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.
question:
Sentence1: Enveloped viruses make their own membranes. 
Sentence2: Some viruses make their own membranes.
answer:
make


question:
Sentence1: microscope is used to see small things by biologists by making them appear bigger. 
Sentence2: Something invented by Leeuwenhoek is used to see small things by biologists by making them appear bigger.
answer:
appear


question:
Sentence1: Many consumers feed at more than one trophic level. 
Sentence2: wood ducks can feed at more than one trophic level.
answer:

feed