With no explanation, label each line with "location-GPE", "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
After
Simeon
's
death
,
Bulgaria
was
weakened
by
wars
with
Magyars
and
Pechenegs
and
the
spread
of
the
Bogomil
heresy
.
After:O
Simeon:person-other
's:O
death:O
,:O
Bulgaria:location-GPE
was:O
weakened:O
by:O
wars:O
with:O
Magyars:location-GPE
and:O
Pechenegs:location-GPE
and:O
the:O
spread:O
of:O
the:O
Bogomil:location-GPE
heresy:O
.:O