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 ":".
And
is
de
facto
official
.
And:O
is:O
de:O
facto:O
official:O
.:O