Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
except as provided in section 19.11 , in the event that any portion of this arbitration agreement is deemed illegal or unenforceable , such provision shall be severed and the remainder of the arbitration agreement shall be given full force and effect . 

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