<|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|>老年期うつ病の発症を促す要因は何ですか？<|eot_id|><|start_header_id|>assistant<|end_header_id|>脳の加齢性の変化や老年期特有の社会的、心理的状況（孤立や孤独、病気など）が原因です。<|eot_id|>