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: Does oral antioxidant supplementation prevent acute mountain sickness : double blind , randomized placebo-controlled trial?
Answer: This trial found no evidence of benefit from antioxidant supplementation at high altitude.
A:
no