Mac::Glue and Address Book

[Ken Williams]

Hi,
When I get a record from the Address Book like so:
  use Mac::Glue ':all';
  my $ab = Mac::Glue->new('Address Book');
  my $person = $ab->obj( people => whose(AND =>
       [[ first_name => begins_with => 'Smorgasbord' ],
        [ last_name  => equals      => 'Milhouse'    ]] );
I can't seem to tell the difference between someone who doesn't exist 
in the Address Book, and someone who exists but has no phone number (or 
address, or whatever).  Any tips on how to do this?

 -Ken