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