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

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