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 school-based physical activity compromise children 's academic performance?
Answer: The AS! BC model is an attractive and feasible intervention to increase physical activity for students while maintaining levels of academic performance.

Ex Output:
no


Ex Input:
Question: Are screening tests enough to detect hemineglect?
Answer: Hemineglect may not be recognized with single screening tests commonly used. The use of a standard battery is recommended to improve diagnostic sensitivity in individuals with various subtypes of hemineglect.

Ex Output:
no


Ex Input:
Question: Are serum S100B and LDH useful in predicting the sentinel node status in melanoma patients?
Answer: In the present study neither serum S100B nor LDH prior to SLND were useful in predicting the histopathological status of the sentinel node. None of them correlated with DFS, DMFS or OS.

Ex Output:

no