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.

Ex Input:
Question: Does cognitive impairment in patients with multiple sclerosis predict worse caregiver 's health-related quality of life?
Answer: MS patients' caregivers' HRQoL is significantly influenced by information processing speed impairment of MS patients.

Ex Output:
yes

Ex Input:
Question: Does aerobic training alter CRP in apparently healthy , untrained men?
Answer: Regular aerobic training does not appear to affect CRP concentrations in apparently healthy, untrained men despite significant improvements in bodyweight, BF%, BMI, and VO2max.

Ex Output:
no

Ex Input:
Question: Are [ Higher nitric oxide levels associated with disease activity in Egyptian rheumatoid arthritis patients ]?
Answer: There are increased levels of nitric oxide in the serum of patients with rheumatoid arthritis. Nitric oxide correlates significantly with disease activity, inflammatory markers and radiological joint status.

Ex Output:
yes