I have a well defined tag hierarchy. So, Places - India has multiple subtags like Maharashtra, Karnataka, etc. And in Maharashtra, I have Mumbai and Pune, etc.

Or in Events, I have get-togethers and walks. And in get-togethers, I have With friends and With family, etc.

I want to find out all pictures that do not carry ANY subtag under Places across all albums.

How do I do that?

How do I do that?