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: Is planimetry of aortic valve area using multiplane transoesophageal echocardiography a reliable method for assessing severity of aortic stenosis?
Answer: Planimetry of aortic valve area by TOE is difficult and less accurate than the continuity equation for assessing the severity of aortic stenosis.
Example Output: no

Example Input: Question: Do norepinephrine and ephedrine counteract the increase in cutaneous microcirculation induced by spinal anaesthesia?
Answer: Improved skin perfusion induced by spinal anaesthesia was not counteracted by the use of norepinephrine or ephedrine.
Example Output: no

Example Input: Question: Is nuclear expression of phosphorylated focal adhesion kinase associated with poor prognosis in human colorectal cancer?
Answer: P-FAK expression is an independent prognostic marker in CRC. The present data suggest that the FAK signalling pathway may interact with TNS4, a known oncogene in CRC.
Example Output:
yes