Detailed Instructions: 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: Does severe and morbid obesity ( BMI 35 kg/m ( 2 ) ) increase surgical time and length of hospital stay in total knee arthroplasty surgery?
Answer: Severely and morbidly obese (SMO) patients (BMI 35 kg/m(2)) undergoing TKA surgery do not require longer operative time or hospital stay than non-obese or obese Class I patients. The fact that surgical time was not significantly different could be due to greater specialisation in the treatment of these patients, which may favour a lower incidence of post-operative complications.
A:
no