Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
if you are using the services on behalf of any entity , you represent and warrant that you are authorised to accept these terms on such entity 's behalf and that such entity agrees to be responsible to us if you or that entity violate these terms . 

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