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 ":".
The
photo
was
soon
proved
to
be
false
.
The:O
photo:O
was:O
soon:O
proved:O
to:O
be:O
false:O
.:O