Other than with links, where we can only try to give a hint of what the parent page of any other content page belongs to.
With schema we can give a clear indication about this.
To do so we use the ‘isPartOf’ property.
As it states in the documentation of Schema.org (which I really recommend to have a look at), the property ‘isPartOf’: Indicates an item or CreativeWork that this item, or CreativeWork (in some sense), is part of.
This means we can indicate what parent page the content page (in our example a FAQ page) belongs to.