Fancy Splitting within a split

[currentlyeddie]

Currently, I split all mail from a writer's e-mail list to one group,
with this basic nnmail-split-fancy value:
("to" "writers@foo\\.edu" "list.writers")
;; addy mangled

List members add subject headers to their mails-- ie, SUB for
submissions, FILL for general chatter. What I want is a split that first
checks if the mail is from the list, then sorts it according to subject
keyword, and then puts any mail without a keyword into a
list.writers.misc group. The manual seems fuzzy on how this is done, if
it can be. Can someone share the recipie?
-- 
Currently Eddie!
http://www.livejournal.com/users/dedwardsauve/
Get your gnus on!