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 ":".
This
requirement
was
met
on
20
July
2001
.
This:O
requirement:O
was:O
met:O
on:O
20:O
July:O
2001:O
.:O