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: Are expression and activity of ABCG2 , but not ABCB1 or OATP1B1 , associated with cholesterol levels : evidence from in vitro and in vivo experiments?
Answer: This study suggested that statins may downregulate ABCG2 expression and function through reducing low-density lipoprotein cholesterol levels.
A:
yes