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: Are arterial stiffness and central arterial wave reflection associated with serum uric acid , total bilirubin , and neutrophil-to-lymphocyte ratio in patients with coronary artery disease?
Answer: N/L ratio and serum UA and TB levels might be used to risk-stratify patients with respect to arterial stiffness in CAD patients, especially in the presence of ACS.
Example Output: yes

Example Input: Question: Do elevated S100B levels correlate with the severity of encephalopathy during sepsis?
Answer: In severe sepsis, an increase in S100B does not allow the physicians to distinguish patients with severe impairment of consciousness from those with milder derangements or to prognosticate neurological recovery.
Example Output: no

Example Input: Question: Does the efficacy of a lysine-based dendritic hydrogel differ from those of commercially available tissue sealants and adhesives : an ex vivo study?
Answer: The efficacy of the PEG-LysNH2 was significantly superior to conventional injury repair methods (sutures) and did not differ from those of commercially available products when sealing small incisions.
Example Output:
no