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 ":".
[
Epub
ahead
of
print
]
.
[:O
Epub:O
ahead:O
of:O
print:O
]:O
.:O