Given a passage with a question and an answer to that question, classify if the answer actually answers the question into 'yes' or 'no'. Output 'yes' if the answer answers the question and output 'no' if the answer does not answer the question.
Q: Question: Are proliferation and differentiation of human adipose-derived mesenchymal stem cells ( ASCs ) into osteoblastic lineage passage dependent?
Answer: Osteogenic potential of ASCs is impaired by successive passaging and may not serve as a useful clinical source of osteogenic ASCs past P2.
A:
yes