Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
( b ) you acknowledge and agree that certain materials on or in the products are the property of third party licensors and , without prejudice to any and all other rights and remedies available , each such licensor has the right to directly enforce relevant provisions of section 12 against you . 

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