Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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you acknowledge and agree that you are responsible for knowing , protecting , and enforcing any intellectual property rights you hold , and that linden lab can not do so on your behalf . 

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