Detailed Instructions: 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.
Q: Question: Does kynurenine production mediated by indoleamine 2,3-dioxygenase aggravate liver injury in HBV-specific CTL-induced fulminant hepatitis?
Answer: Kynurenine and IFN- induced by the administration with HBV-specific CTL are cooperatively involved in the progression of liver injury in acute hepatitis model. Our results may lead to a new therapy for the acute liver injury caused by HBV infection.
A:
yes