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: Osteoporosis is a disease in which osteoclasts are more active than osteoblasts.
Sentence2: a thinning and weakening of bone is a disease in which osteoclasts are more active than osteoblasts.
answer:
active

question:
Sentence1: a mutation in the sex cells of a parent can cause a new trait to appear in the parent 's offspring.
Sentence2: cancer of a parent's cells can cause a new trait to appear in their offspring.
answer:
appear

question:
Sentence1: Amphibians are the first true tetrapods, or vertebrates with four limbs.
Sentence2: Amphibians with four limbs are more advanced than fish.
answer:
Amphibians