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: Is tumor differentiation a risk factor for lymph node metastasis in elderly patients with early gastric cancer?
Answer: Elderly patients with undifferentiated type histology early gastric cancer without other risk factors for lymph node metastasis may be candidates for endoscopic resection.
no

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.
no

Question: Does a yearlong exercise intervention decrease CRP among obese postmenopausal women?
Answer: A moderate-intensity exercise intervention reduced CRP for 12 months among women who were obese at baseline. These findings support the role of exercise in modulating inflammatory processes that are related to increased risk of chronic disease among obese women.
yes