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.

Ex Input:
Question: Does early reattachment reverse atrophy and fat accumulation of the supraspinatus -- an experimental study in rabbits?
Answer: In the rabbit, reattachment of the SSP at 6 weeks did neither reverse muscle atrophy nor fat accumulation during the ensuing 6 weeks. However, earlier reattachment (6 weeks) when compared with later reattachment (12 weeks) prevented an increase in fat accumulation. On the other hand, the delay before reattaching the tendon did not lead to an increase in muscle atrophy.

Ex Output:
no


Ex Input:
Question: Is patient satisfaction biased by renovations to the interior of a primary care office : a pretest-posttest assessment?
Answer: Renovating the interior of a primary care office was associated with improved patient satisfaction, including satisfaction in domains otherwise unchanged. Physician skills and patient satisfaction sometimes depend on surrounding factors that may bias the ability of patients to assess the quality of medical care. These biases should be taken into account when quality assessment instruments are designed for patients.

Ex Output:
yes


Ex Input:
Question: Does hemoglobin variability predict mortality in peritoneal dialysis patients?
Answer: Hemoglobin variability does not predict mortality in peritoneal dialysis patients.

Ex Output:

no