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 ":".
Its
interior
can
be
visited
during
events
.
Its:O
interior:O
can:O
be:O
visited:O
during:O
events:O
.:O