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.

Ex Input:
Question: Does transient ischemia limit subsequent ischemic regional dysfunction in humans : a transesophageal echocardiographic study during minimally invasive coronary artery bypass surgery?
Answer: Ischemic dysfunction was precipitated by the 5-min LAD occlusion, as shown by the increase in LVWMS and pulmonary artery pressure. However, a 5-min coronary occlusion and the resulting ischemia do not alter regional left ventricular systolic function during subsequent ischemia in humans.

Ex Output:
no


Ex Input:
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.

Ex Output:
no


Ex Input:
Question: Is prediction of critical weight loss during radiation treatment in head and neck cancer patients dependent on BMI?
Answer: Pre-treatment BMI, tumor site and stage predicted weight loss above 5 % in HNSCC patients during radiotherapy. BMI should be considered when analyzing weight loss in HNSCC patients receiving curative radiotherapy.

Ex Output:

yes