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: Climate refers to weather over a long period of time. 
Sentence2: weather is generally described in terms of temperature and moisture.
answer:
long


question:
Sentence1: Muscles can only contract. 
Sentence2: Contraction is a type of movement.
answer:
contract


question:
Sentence1: Internal organs that can be affected include kidneys, lungs, heart and brain. 
Sentence2: bone provides protection for lungs.
answer:

lungs