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 ":".
The
country
had
already
acquired
Northern
Dobruja
in
1878
.
The:O
country:O
had:O
already:O
acquired:O
Northern:location-GPE
Dobruja:location-GPE
in:O
1878:O
.:O