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: Consider Input: Question: Does l-Tryptophan influence acute ventilatory response at moderate altitude?
Answer: L-tryptophan does not impair ventilatory adaptation to mild hypoxia at moderate altitude.

Output: no


Input: Consider Input: Question: Are complaints of sleep disturbances associated with cardiovascular disease : results from the Gutenberg Health Study?
Answer: Given the high prevalence of complaints of sleep disturbances and their strong impact on health status, increased efforts should be undertaken for their identification and treatment.

Output: yes


Input: Consider Input: Question: Do rheumatoid factor and anti-CCP predict progressive joint damage in patients with early rheumatoid arthritis treated with prednisolone : a randomised study?
Answer: The presence of RF and anti-CCP predicted radiographic progression in patients not treated with prednisolone but failed to predict progression in patients treated with this drug. The data suggest that early treatment with prednisolone may modulate not only inflammation but also autoimmunity-associated pathogenetic mechanisms.


Output: no