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 mutations of Two Major Coagulation Factors Associated with Male Infertility?
Answer: An association of the two common thrombophilia-related mutations with male infertility was not observed in this preliminary study.
A:
no