With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Over
20,000
entries
were
received
for
the
2009
event
.
Over:O
20,000:O
entries:O
were:O
received:O
for:O
the:O
2009:O
event:O
.:O