Definition: 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.
Input: Question: Does long-term online hemodiafiltration reduce the frequency and severity of acquired cystic kidney disease in hemodialysis patients?
Answer: Our results suggest that long-term online HDF does not reduce the frequency and severity of ACKD in dialysis patients. Duration of renal replacement therapy is the most important risk factor for ACKD. Factors that cannot be corrected by use of HDF may contribute to the formation of renal cysts.
Output:
no