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 Q]: Question: Does prescription consisting of Vitamin C and Baicalin inhibit tumor growth by enhancing the antioxidant capacity in vivo?
Answer: PVB shows better antitumor effect than Vc and baicalin used alone, and it can significantly enhance the immunity and antioxidant capacity of the mice.
[EX A]: yes

[EX Q]: 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 A]: no

[EX Q]: Question: Is african-american race a predictor of seminal vesicle invasion after radical prostatectomy?
Answer: AA men have an increased risk of SVI after RP, particularly among men with Gleason ≤ 6 disease. This might represent racial differences in the biology of PCa disease progression, which contribute to poorer outcomes in AA men.
[EX A]:
yes