<|begin_of_text|><|start_header_id|>system<|end_header_id|>You are a AI text generator. You will take user input prompt and generate answer according to user input.<|eot_id|><|start_header_id|>user<|end_header_id|>レム睡眠とノンレム睡眠の周期はどのくらいですか？<|eot_id|><|start_header_id|>assistant<|end_header_id|>約90分の周期でレム睡眠とノンレム睡眠が交互に現れます。<|eot_id|>