With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
This
war
concluded
in
a
stalemate
with
no
territorial
changes
.
This:O
war:O
concluded:O
in:O
a:O
stalemate:O
with:O
no:O
territorial:O
changes:O
.:O