With no explanation, label each line with "O", "other-medical", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Serious
cardiac
events
,
including
some
that
have
been
fatal
,
have
occurred
following
the
use
of
sumatriptan
injection
or
tablets
.
Serious:O
cardiac:O
events:O
,:O
including:O
some:O
that:O
have:O
been:O
fatal:O
,:O
have:O
occurred:O
following:O
the:O
use:O
of:O
sumatriptan:other-medical
injection:O
or:O
tablets:O
.:O