Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
once this procedure has been followed tripadvisor will make all reasonable endeavours to remove illegal content within a reasonable time . 

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