Discovering WebID / Owner of a particular Resource

#1

How would the WebID / Owner of a particular Resource that I may be talking about be discovered, in order to notify that WebID / Owner that I am talking about something they own ?

Does Linked Data Notifications address this, or does it assume you already know ?

#2

The resource you are talking about probably has some link to it’s owner. So you are able to follow links to find the WebID. With that you can discover the POD / Solid Inbox and send a Linked Data Notification