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 ":".
It
was
destroyed
in
1945
and
is
now
known
only
from
black-and-white
photographs
and
enhanced
color
reproductions
.
It:O
was:O
destroyed:O
in:O
1945:O
and:O
is:O
now:O
known:O
only:O
from:O
black-and-white:O
photographs:O
and:O
enhanced:O
color:O
reproductions:O
.:O