Provide a detailed explanation of how to make a classic apple pie, ensuring the instructions are clear and easy to follow. Your response should contain at least 3 placeholders represented by square brackets, such as [ingredient]. Include keywords [butter, sugar, cinnamon, pie crust]. The response must have 4 sections. Mark the beginning of each section with SECTION X, such as: SECTION 1. At the end of your response, please explicitly add a postscript starting with P.S.
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