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.
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Question: Question: Does chronic reduction of myocardial ischemia attenuate coronary collateral development in miniswine?
Answer: We conclude that growth and development of the coronary collateral circulation measured functionally during exercise at 90% of maximal heart rate is unrelated to the extent and duration of myocardial ischemia in this model.

Answer: no

Question: Question: Does revaccination with Bacillus Calmette-Guerin ( BCG ) vaccine reduce morbidity from malaria in African children?
Answer: We found no evidence that BCG revaccination reduces morbidity from malaria.

Answer: no

Question: Question: Does b7-H4 overexpression impair the immune response of T cells in human cervical carcinomas?
Answer: B7-H4 is overexpressed in human cervical cancers, and it is associated with lower numbers of tumor-infiltrating CD8(+)T lymphocytes and therefore less IFN- production. In vitro, B7-H4 inhibits the proliferation of CD4(+)T and CD8(+)T but promotes the proliferation of Tregs and the secretion of IL-10 and TGF-1. B7-H4 plays an important role in depressing the anti-tumor immunity of CD8(+)T cell in microenvironments of cervical cancer.

Answer:
yes