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: Is lactose maldigestion an impediment to the intake of 1500 mg calcium daily as dairy products?
Answer: The symptoms resulting from lactose maldigestion are not a major impediment to the ingestion of a dairy-rich diet supplying approximately 1500 mg Ca/d.
[A]: no


[Q]: Question: Are complaints of sleep disturbances associated with cardiovascular disease : results from the Gutenberg Health Study?
Answer: Given the high prevalence of complaints of sleep disturbances and their strong impact on health status, increased efforts should be undertaken for their identification and treatment.
[A]: yes


[Q]: Question: Is increased expression of pleiotrophin a prognostic marker for patients with gastric cancer?
Answer: These findings indicated that the expression of PTN is significantly correlated with prognosis in gastric cancer patients, suggesting that the expression of PTN may be used as an independent prognostic marker.
[A]:
yes