Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
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 . 

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