instruction:
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.
question:
Question: Are factors associated with HIV infection the same for all women?
Answer: Factors vary in importance and significance of association with HIV infection in different subpopulations of women resident in Great Britain. This diversity is also likely to occur in other populations. It is important to identify these differences between subpopulations. Prevention and control policies and activities for HIV/AIDS cannot treat all women as if they were the same.
answer:
no


question:
Question: Is the covariation between burnout and sick leave due to mental disorders explained by a shared genetic liability : a prospective swedish twin study with a five-year follow-up?
Answer: The association between burnout and sick leave due to stress-related and other mental disorders seems to be a reflection of a shared genetic liability.
answer:
yes


question:
Question: Is cytokeratin 20 a tissue-specific marker for the detection of malignant epithelial cells in the blood of colorectal cancer patients?
Answer: The lack of colon tissue-specificity renders ck20 useless as a marker for the post-operative surveillance of colorectal cancer patients.
answer:

no