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.
Input: Question: Are polymorphisms in the promoter region and at codon 54 of the MBL2 gene associated with IgA nephropathy?
Answer: This study indicates that the analysed polymorphisms of the MBL gene do not appear to be primarily involved in the susceptibility and severity of IgAN.
Output:
no