Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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you agree and acknowledge that the materials are valuable property and that other than any specific and limited license for use of such materials , you shall not acquire any ownership rights in or to such materials . 

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