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.
Q: Question: Is myocardial contractility constant during spontaneous atrial fibrillation in patients?
Answer: Myocardial contractility is constantly changing from beat to beat in atrial fibrillation because of the influence of the force-interval relationships.
A:
no