With no explanation, label each line with "other-disease", "O", "other-medical", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Botulinum
toxin
A
is
used
to
treat
involuntary
muscle
contraction
and
spasms
.
Botulinum:other-medical
toxin:other-medical
A:other-medical
is:O
used:O
to:O
treat:O
involuntary:other-disease
muscle:other-disease
contraction:other-disease
and:O
spasms:other-disease
.:O