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 fragmented QRS associated with frequency of premature ventricular contractions in patients without overt cardiac disease?
Answer: This study demonstrated that the presence of fQRS is associated with frequent PVCs in patients without overt structural heart disease.
yes