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: Does coronary bypass grafting using crossclamp fibrillation result in reliable reperfusion of the myocardium when the crossclamp is intermittently released : a prospective cohort study?
Answer: Crossclamp fibrillation does not result in reliable reperfusion of the myocardium between periods of crossclamping.
no