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 ":".
When
objects
began
to
move
they
would
disappear
.
When:O
objects:O
began:O
to:O
move:O
they:O
would:O
disappear:O
.:O