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 ":".
He
becomes
Earl
of
Kattegat
after
he
challenges
and
kills
the
ruthless
Earl
Haraldson
.
He:O
becomes:O
Earl:O
of:O
Kattegat:location-GPE
after:O
he:O
challenges:O
and:O
kills:O
the:O
ruthless:O
Earl:O
Haraldson:person-other
.:O