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 ":".
The
brothers
began
2011
at
the
2011
Medibank
International
Sydney
where
they
reached
the
final
.
The:O
brothers:O
began:O
2011:O
at:O
the:O
2011:O
Medibank:event-sportsevent
International:event-sportsevent
Sydney:event-sportsevent
where:O
they:O
reached:O
the:O
final:O
.:O