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.
Input: Question: Is matrix metalloproteinase 10 associated with disease severity and mortality in patients with peripheral arterial disease?
Answer: Our results suggest that MMP-10 is associated with severity and poor outcome in PAD.
Output:
yes