With no explanation, label each line with "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
battalion
played
a
major
role
in
the
Battle
of
Hue
during
February
1968
.
The:O
battalion:O
played:O
a:O
major:O
role:O
in:O
the:O
Battle:event-attack/battle/war/militaryconflict
of:event-attack/battle/war/militaryconflict
Hue:event-attack/battle/war/militaryconflict
during:O
February:O
1968:O
.:O