Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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once this procedure has been followed tripadvisor will make all reasonable endeavours to remove illegal content within a reasonable time . 

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. OPTIONS: ["Limitation of liability", "Jurisdiction", "Contract by using", "Unilateral change", "Unilateral termination", "Arbitration", "None", "Content removal", "Choice of law"].