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: Consider Input: Question: Do several mechanical manipulations of the wall of the inner ear affect air and bone conduction auditory thresholds?
Answer: It is likely that an alternative mode of cochlear excitation is possible.

Output: no


Input: Consider Input: Question: Is sleep disturbance after fracture related to emotional well-being rather than functional result?
Answer: At 12-month follow-up, poor sleep was independently associated with poor emotional status but not associated with poor functional status. The mental health status of patients with sleep difficulty in the latter stages of fracture healing should be carefully assessed to provide the highest level of care. The results of this study should allow orthopaedic trauma surgeons to counsel patients regarding expectations of difficulty sleeping after acute fractures.

Output: yes


Input: Consider Input: Question: Is chromogranin A a reliable serum diagnostic biomarker for pancreatic neuroendocrine tumors but not for insulinomas?
Answer: CgA is a reliable serum diagnostic biomarker for PNETs but not for insulinomas.


Output: yes