Instructions: 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: Question: Do haemoglobin levels correlate with the extent of coronary artery disease : results from a large cohort study?
Answer: This study showed that Hb levels are not associated with the prevalence and extent of CAD.
Output:
no