Region contains building

I'm aware this is a bit of a newb question, but

(NorthAncientBL <gen> contains Ancient of War 0095 <gen>) Equal to True

I want that to be (NorthAncientBL <gen> contains an Ancient of War ) Equal to True

or if I must

(NorthAncientBL <gen> contains A Building) Equal to True


I know I can manipulate it using pick all units in region X matching condition [being the building obviously], and add to group Y... and if Y > 0 then do the actions...

Is there a simpler way?

What's wrong with the unit group method? I think that is the best solution.