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: Does chlamydia pneumoniae hide inside apoptotic neutrophils to silently infect and propagate in macrophages?
Answer: Taken together, our data suggest that C. pneumoniae uses neutrophil granulocytes to be silently taken up by long-lived macrophages, which allows for efficient propagation and immune protection within the human host.
Example Output: yes

Example Input: Question: Does short duration exhaustive running exercise modify lipid hydroperoxide , glutathione peroxidase and catalase?
Answer: As a result, it may be claimed that short duration exhaustive exercise test produced no important changes in LOOH, GPx and CAT levels. And exhaustive exercise-induced oxidative stress may be related with exercise duration.
Example Output:
no