Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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you certify that you are of the legal age of majority in the jurisdiction in which you reside or , if you are between the ages of 13 and the legal age of majority , that you are using the services with the supervision of your parent or legal guardian who agrees to be bound by these terms of service . 

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