Kill certain articles in certain groups all from gnus.el

[jidanni]

Gentlemen, I wish to
Kill (so I don't see them) all articles
that match Subject: /xxx/
whose group name matches: /yyy/
and have this all contained within my .gnus.el file for easy maintenance.

I don't want to have 15 identical files one for each group.

I don't want a global kill string that matches every group.

I don't want this stuck in some binary .eld file that I have to fight with gnus 
about who gets to edit it.