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 ":".
Such
a
procedure
is
naturally
quite
painful
.
Such:O
a:O
procedure:O
is:O
naturally:O
quite:O
painful:O
.:O