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: Do expanded effector memory T-lymphocytes in DBA/2 mice inhibit the growth of SL2 tumours?
Answer: SL2 tumours induce expansion of effector memory lymphocytes in DBA/2 mice. However, expanded effector memory lymphocytes do not inhibit the growth of tumours.
[EX A]: no

[EX Q]: Question: Does production of infectious human immunodeficiency virus type 1 require depletion of APOBEC3G from virus-producing cells?
Answer: Our results suggest that Vif and APOBEC3G can be efficiently co-expressed. Thus, depletion of APOBEC3G from Vif expressing cells as suggested previously is not a universal property of Vif and thus is not imperative for the production of infectious virions.
[EX A]: no

[EX Q]: Question: Does bMP-7 counteract TGF-beta1-induced epithelial-to-mesenchymal transition in human renal proximal tubular epithelial cells?
Answer: These data suggest that BMP-7 attenuates progressive loss of kidney function and renal fibrosis through counteracting TGF-beta1-mediated EMT.
[EX A]:
yes