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 ":".
His
third
trip
was
in
2000
.
His:O
third:O
trip:O
was:O
in:O
2000:O
.:O