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: a fire requires oxygen to burn. 
Sentence2: If the oxygen is removed, the fire is smothered.
answer:
oxygen


question:
Sentence1: Many warm-blooded animals control their body temperature by sweating or panting. 
Sentence2: warm-blooded creatures control their body temperature by sweating or panting for survival.
answer:

body