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.

Question: Is smoking a protective factor for patients with acute myocardial infarction : the viewpoint of the GISSI-2 Study?
Answer: Active smokers presented a lower incidence of reinfarction, stroke and in-hospital mortality rates, but after adjustment for other clinical-epidemiological variables, the apparent protective role of smoking was not confirmed.
no