I'd like to have any followers pick from a very specific few comments when they run through my trigger (or when I do, whatever). How can I do this?

I'd like to have them make a remark about a cave or tunnel but I'm inside a Dwemer Ruin. I have already got a generic Dwemer ruin comment trigger set up elsewhere in the dungeon, I don't want to ruin this by adding the cave keywords to the location.

Actually, how do I select which quest I want a comment from? There's FollowerCommentary01 (Entrances to Dungeons), FollowerCommentary02 (Follower sees an impressive view), and FollowerCommentary03 (Danger Ahead).
The script on the defaultWICommentTRIG object only let's you pick a keyword..........