Global Administrative Areas

hello,
i'm trying to render gadm data with mapnik; in order to render labels that show the name of the respective country/region/district, i'd need to know how the attribute column where the location name is stored is called. i tried to "look" into the shp-file but all i found where empty "name"-attributes - is it possible that the name of each country/region/district is not stored in the shapefiles, or if it is, could you tell me the name of the attribute column?
find below a copy of the mapnik xml file i used, which perfectly renders outlines, but no labels
thanks,

<?xml version="1.0" encoding="utf-8"?>

#cccccc

#000000
1

administrative
label

shape
../data/AUT_adm/AUT_adm0

administrative
label

shape
../data/AUT_adm/AUT_adm1

administrative
label

shape
../data/AUT_adm/AUT_adm2