With no explanation, label each line with "O", "event-sportsevent", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
A
hip
injury
forced
Rhode
to
withdraw
from
the
North
American
Championships
in
early
February
1961
.
A:O
hip:O
injury:O
forced:O
Rhode:O
to:O
withdraw:O
from:O
the:O
North:event-sportsevent
American:event-sportsevent
Championships:event-sportsevent
in:O
early:O
February:O
1961:O
.:O