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: Is postoperative intravenous drip infusion required after minilaparotomy cholecystectomy?
Answer: There is no clinical indication to continue IV drip infusion after full recovery from anaesthesia in patients operated for minilaparotomy cholecystectomy.

Ex Output:
no


Ex Input:
Question: Is mYC a metastasis gene for non-small-cell lung cancer?
Answer: Potential markers for detection of metastasis were identified and validated for diagnosis of human biopsies. These markers may represent targets for future therapeutic intervention as they include genes such as Gata4 that are exclusively expressed during lung development.

Ex Output:
yes


Ex Input:
Question: Is cagA-positive Helicobacter pylori infection associated with decreased risk of Barrett 's esophagus in a population with high H. pylori infection rate?
Answer: Neither H. pylori infection nor H. pylori infection by CagA+ strains reduce the risk of BE in a population with high prevalence of H. pylori infection.

Ex Output:

no