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: Carpools and vanpools can save time. 
Sentence2: vanpools decrease the amount of cars used to travel to a place.
answer:
vanpools


question:
Sentence1: Viruses are parasites of cells. 
Sentence2: Populations of viruses do not grow through division because they are parasites.
answer:
are


question:
Sentence1: some light bulbs convert electricity into light and heat energy. 
Sentence2: some light bulbs convert electricity into light and the amount of energy in a substance.
answer:

bulbs