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 ":".
In
the
970s
,
Haakon
Sigurdsson
,
Jarl
of
Lade
,
became
the
most
powerful
man
in
Norway
,
at
first
supported
by
Harald
Bluetooth
of
Denmark
and
paying
tribute
to
him—though
the
two
later
fell
out
over
religious
matters
.
In:O
the:O
970s:O
,:O
Haakon:person-other
Sigurdsson:person-other
,:O
Jarl:person-other
of:person-other
Lade:person-other
,:O
became:O
the:O
most:O
powerful:O
man:O
in:O
Norway:location-GPE
,:O
at:O
first:O
supported:O
by:O
Harald:person-other
Bluetooth:person-other
of:O
Denmark:location-GPE
and:O
paying:O
tribute:O
to:O
him—though:O
the:O
two:O
later:O
fell:O
out:O
over:O
religious:O
matters:O
.:O