I'll give you a question, please answer with step-by-step reasoning process. Because John was first violin, he had to bring something important to work ever day. What did he need to bring to work?\nOptions:\n- music store\n- obesity\n- symphony orchestra\n- ochestra\n- violin case

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The person who is first violin needs to works on violin every day for practice. Violin needs to be kept in violin case so person has to bring violin case daily for practice. Violin case is important to keep the violin safe.
The answer: violin case.
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