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 ":".
Each
highway
bridge
consists
of
two
spans
.
Each:O
highway:O
bridge:O
consists:O
of:O
two:O
spans:O
.:O