which which

[cbmvax!uunet!math.ucla.edu!jimc]

In putting together some sentences for the L.A. group I was hunting for
a cmavo which I'm sure is there, but which I couldn't find.  Can someone
please translate:

	which cat caught the rat

The problem word is "which" in the outside quantifier site.  Also inside,
if different.  

		-- jimc