With no explanation, label each line with "location-GPE", "O", "other-law", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Thus
,
on
30
August
,
Romania
ceded
Northern
Transylvania
to
Hungary
in
the
Second
Vienna
Award
,
while
at
the
Treaty
of
Craiova
of
7
September
,
Romania
returned
Southern
Dobruja
to
Bulgaria
.
Thus:O
,:O
on:O
30:O
August:O
,:O
Romania:location-GPE
ceded:O
Northern:location-GPE
Transylvania:location-GPE
to:O
Hungary:location-GPE
in:O
the:O
Second:event-attack/battle/war/militaryconflict
Vienna:event-attack/battle/war/militaryconflict
Award:event-attack/battle/war/militaryconflict
,:O
while:O
at:O
the:O
Treaty:other-law
of:other-law
Craiova:other-law
of:O
7:O
September:O
,:O
Romania:location-GPE
returned:O
Southern:location-GPE
Dobruja:location-GPE
to:O
Bulgaria:location-GPE
.:O