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 ":".
For
a
while
no
special
restrictions
were
needed
for
that
(
e.g
.
For:O
a:O
while:O
no:O
special:O
restrictions:O
were:O
needed:O
for:O
that:O
(:O
e.g:O
.:O