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 identification of structural alert for liver and kidney toxicity using repeated dose toxicity data?
Answer: It was not possible to assign an unambiguous mode of action for all the SAs, but a mechanistic explanation is provided for some of them. Such achievements may help in the early identification of liver and renal toxicity of substances.

A: yes
****
Q: Question: Does ginsenoside Rg3 improve erectile function in streptozotocin-induced diabetic rats?
Answer: Oral gavage with Rg3 appears to both prevent degeneration of neurons in the dorsal nerves and exert an antioxidant effect in the corpus cavernosum of rats.

A: yes
****
Q: Question: Is percutaneous biliary drainage oncologically inferior to endoscopic drainage : a propensity score matching analysis in resectable distal cholangiocarcinoma?
Answer: Compared with EBD, PTBD increases the incidence of seeding metastasis after resection for distal cholangiocarcinoma and shortens postoperative survival.

A:
yes
****