With no explanation, label each line with "O", "event-sportsevent", "building-sportsfacility", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
Ladbrokes
Summer
Stayers
Classic
is
a
greyhound
racing
competition
held
annually
at
Monmore
Green
Stadium
.
The:O
Ladbrokes:event-sportsevent
Summer:event-sportsevent
Stayers:event-sportsevent
Classic:event-sportsevent
is:O
a:O
greyhound:O
racing:O
competition:O
held:O
annually:O
at:O
Monmore:building-sportsfacility
Green:building-sportsfacility
Stadium:building-sportsfacility
.:O