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.
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Question: Question: Does statin therapy improve lung function in asthma : a meta-analysis of randomized controlled trials?
Answer: In conclusion, there is currently insufficient evidence to show that statins improve lung function in patients with asthma.

Answer: no

Question: Question: Does presence of the full-length KIR2DS4 gene reduce the chance of rheumatoid arthritis patients to respond to methotrexate treatment?
Answer: Our results suggest that the response of RA patients with medium ESR values to MTX treatment may be dependent on the full-length KIR2DS4 gene.

Answer: yes

Question: Question: Is disagreement in preference for residential care between family caregivers and elders greater among cognitively impaired elders group than cognitively intact elders group?
Answer: Cognitively intact elders were more likely to indicate preference for residential care than cognitively impaired elders. Elders, both cognitively intact and impaired, were less likely than their caregivers to indicate preference for residential care. Disagreement in preference for residential care between the elders and their caregivers was larger for the cognitively impaired group than the cognitively intact group.

Answer:
yes