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: Is dorsal plication without degloving safe and effective for correcting ventral penile deformities?
Answer: Penile plication is a safe and effective technique for correcting all directions of curvature. Dorsal plication without degloving produces favorable objective and subjective results comparable to ventral and lateral plication.

Output: yes


Input: Consider 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.

Output: yes


Input: Consider Input: Question: Does progressive periodontal disease have a simultaneous incremental elevation of gingival crevicular fluid and serum CRP levels?
Answer: C-reactive protein levels in gingival crevicular fluid and serum increased proportionately with the severity of periodontal disease. They correlated positively with clinical parameters, including gingival index, probing pocket depth, and clinical attachment level. Thus, it can be considered as a periodontal inflammatory biomarker and deserves further consideration.


Output: yes