With no explanation, label each line with "location-GPE", "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Four
well-equipped
ships
of
Haakon
IV
of
Norway
burned
Bjarmian
towns
to
the
ground
.
Four:O
well-equipped:O
ships:O
of:O
Haakon:person-politician
IV:person-politician
of:O
Norway:location-GPE
burned:O
Bjarmian:location-GPE
towns:O
to:O
the:O
ground:O
.:O