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
toxin
is
also
used
commercially
for
medical
and
cosmetic
purposes
.
The:O
toxin:O
is:O
also:O
used:O
commercially:O
for:O
medical:O
and:O
cosmetic:O
purposes:O
.:O