With no explanation, label each line with "O", "organization-company", "event-sportsevent", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
It
was
the
sixth
annual
Unforgiven
event
and
featured
wrestlers
from
the
Raw
brand
division
.
It:O
was:O
the:O
sixth:O
annual:O
Unforgiven:event-sportsevent
event:O
and:O
featured:O
wrestlers:O
from:O
the:O
Raw:organization-company
brand:O
division:O
.:O