Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you understand that crowdtangle 's service is built on api 's provided by third-party services , including facebook , twitter , instagram and others , and from time-to-time , there are adverse events with respect to those apis that are no fault of crowdtangle 's . 

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