Q: 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.
Question: Does blockade of CD40-CD154 at the time of donor-specific blood transfusion lead to prolonged kidney allograft survival in nonhuman primates?
Answer: DST under the cover of relatively high levels of anti-CD154 failed to result in prolonged graft survival or prevent the formation of antidonor antibodies, when cyclosporine was given after transplantation.
A:
no