With no explanation, label each line with "person-soldier", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
On
2
April
,
300
to
400
rebels
attacked
,
led
by
Accara
which
drove
them
back
.
On:O
2:O
April:O
,:O
300:O
to:O
400:O
rebels:O
attacked:O
,:O
led:O
by:O
Accara:person-soldier
which:O
drove:O
them:O
back:O
.:O