Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
by using the tripadvisor websites , you represent and warrant that you are not located in , under the control of , or a national or resident of any such country or on any such list . 

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