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