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: Water is essential for all life on Earth. 
Sentence2: H2O is needed for all life on Eartth.
answer:
Earth


question:
Sentence1: Absorption of nutrients occurs mainly in the small intestine. 
Sentence2: The small intestine is the main place where food absorption occurs.
answer:
intestine


question:
Sentence1: high pressure systems cause clear weather. 
Sentence2: Anticyclones cause clear weather.
answer:

clear