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: Smoking accelerates the aging process. 
Sentence2: smoking accelerates the death of cells.
answer:
Smoking


question:
Sentence1: harming an animal species causes that animal 's population to decrease. 
Sentence2: Oil spill sare harmful to animals and the enviroment.
answer:
harming


question:
Sentence1: Ribosomes are sites where proteins are made. 
Sentence2: ribosomes have RNA.
answer:

Ribosomes