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 ":".
Usage
was
extended
to
in
January
1987
.
Usage:O
was:O
extended:O
to:O
in:O
January:O
1987:O
.:O