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.

Example Input: Question: Is congenital penile pathology associated with abnormal development of the dartos muscle : a prospective study of primary penile surgery at a tertiary referral center?
Answer: Congenital penile pathology (hypospadias, buried penis) is associated with structural anomalies in dartos tissue. Further research is needed to unveil the pathophysiology of the condition.
Example Output: yes

Example Input: Question: Does a null mutation in ANGPTL8 associate with either plasma glucose or type 2 diabetes in humans?
Answer: Disruption of ANGPTL8 function in humans does not seem to have a large effect on measures of glucose tolerance.
Example Output: no

Example Input: Question: Is tCF7L2 a major susceptibility gene for type 2 diabetes in Pima Indians : analysis of 3,501 individuals?
Answer: Variation within TCF7L2 does not confer major risk for type 2 diabetes among the Pima Indian population.
Example Output:
no