With no explanation, label each line with "organization-other", "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
During
World
War
II
,
the
city
sent
12,258
soldiers
in
the
Soviet
army
,
and
4,728
never
returned
home
.
During:O
World:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
II:event-attack/battle/war/militaryconflict
,:O
the:O
city:O
sent:O
12,258:O
soldiers:O
in:O
the:O
Soviet:organization-other
army:organization-other
,:O
and:O
4,728:O
never:O
returned:O
home:O
.:O