Detailed 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.
Q: Question: Is routine intravascular ultrasound scanning guidance of coronary stenting associated with improved clinical outcomes?
Answer: These data suggest that the routine performance of IVUS during stent placement influences the performance of the procedure, as judged by differences in procedural characteristics, but does not improve clinical outcome at 9 months.
A:
no