How do I get all the comments for the entire site?

Hey

I understand you can get read-out JSON comments for a particular URL through

Https://graph.facebook.com/comments/?ids= {YOUR_URL}.

But I can't figure out how to get all the comments for my site. I tried to transfer my domain only for {YOUR_URL} instead of the full URL to the page, as well as identifying my application. But no joy.

This is certainly possible. Any help is appreciated! Perhaps through FQL instead?

Andy