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: Carbon cycles quickly between organisms and the atmosphere. 
Sentence2: the atmosphere is essential to all living organisms.
answer:
organisms


question:
Sentence1: Some mollusks are nearly microscopic. 
Sentence2: Some squids are nearly microscopic.
answer:
Some


question:
Sentence1: Water is made up of H2O molecules. 
Sentence2: beads of h2o are formed by h2o vapor condensing.
answer:

H2O