With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
This
system
became
known
as
Westphalian
sovereignty
.
This:O
system:O
became:O
known:O
as:O
Westphalian:location-GPE
sovereignty:O
.:O