Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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all parties to the arbitration will have the right , at their own expense , to be represented by an attorney or other advocate of their choosing . 

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