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 ":".
Anticonvulsant
medication
is
commonly
prescribed
for
migraine
prevention
,
because
they
have
been
shown
in
placebo-controlled
double-blind
trials
to
be
effective
in
some
migraine
sufferers
.
Anticonvulsant:other-medical
medication:O
is:O
commonly:O
prescribed:O
for:O
migraine:other-disease
prevention:O
,:O
because:O
they:O
have:O
been:O
shown:O
in:O
placebo-controlled:O
double-blind:O
trials:O
to:O
be:O
effective:O
in:O
some:O
migraine:other-disease
sufferers:O
.:O