A way to filter by Safe/Questionable/Explicit when searching by tags?

Say I want to find all questionable huge breast pics or safe feet pics, etc etc.

I've been looking around, used wiki, help, searched forums. Can't find anything. Is it so obvious that even I'm missing it? =(

rating:s, rating:q, and rating:e are how you search by the post's rating.

http://danbooru.donmai.us/help/cheatsheet