> 
> For example, guest PTEs for which
> shadow PTEs have been constructed may be write-protected.
> 
> 
> 

OK, so which one is correct:

1. The point is shadow PTEs. It's constructed for guest PTEs and it's write-protected.
2. The point is guest PTEs and it's write-protected. While the author mentioned that the shadow PTEs that is somehow related to it.

What is the point? Could you use another simple sentence without "for which" to help me understand the important part of this sentence?