Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
headspace ® , the headspace logo and all other headspace product or service marks are trademarks of headspace . 

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