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 young age under 60 years a contraindication to treatment with definitive dose escalated radiotherapy for prostate cancer?
Answer: This is the largest, most mature study of younger men treated with RT for prostate cancer that confirms young age is not prognostic for BF.
A:
no