Coordinates relative to grandparent?

I’m sorry, I’m sure this has been answered, but I don’t know how to word a search without getting a bunch of irrelevant stuff.

I’m loading a game swf into another swf and I’m trying to get the coordinates of some nested sentry clips relative to the game swf stage. localtoGlobal will, of course, only return their coordinates based on level0 which will be the other swf that the game is in.

My levels are essentially:

Container swf
–Game swf

and I’d like to get the sentry_mc._x based on the gameHolder_mc