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.

Example Input: Question: Do [ Effectiveness of a suture bridge technique for repair of quadriceps tendon rupture in uraemic patients ]?
Answer: For fewer traumas and early functional exercise after operation, the suture bridge technique benefits functional restoration of knee joint in uraemic patients. Operation chance and age seem to be important factors to the results. Early operation should be considered when quadriceps tendon ruptured.
Example Output: yes

Example Input: Question: Is lubricin a product of megakaryocyte stimulating factor gene expression by human synovial fibroblasts?
Answer: Lubricin is secreted by synovial fibroblasts via expression of the MSF gene. Lubricin is constructed of MSF exons 6 through 9 but the presence of other exons cannot be excluded. Lubricin/MSF is the only lubricating component in the final lubricating fraction of human synovial fluid.
Example Output: yes

Example Input: Question: Does expression of Bcl-2 predict outcome in locally advanced non-small cell lung cancer patients treated with cisplatin-based concurrent chemoradiotherapy?
Answer: High expression of Bcl-2 may be a useful prognostic factor in locally advanced NSCLC patients treated with cisplatin-based CCRT.
Example Output:
yes