With no explanation, label each line with "O", "organization-sportsleague", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
the
beginning
the
PWF
recognized
a
world
heavyweight
championship
and
several
``
regional
championships
''
given
as
billing
to
foreign
stars
depending
from
which
region
they
came
from
,
but
after
All
Japan
joined
the
National
Wrestling
Alliance
(
NWA
)
,
the
PWF
world
title
was
downgraded
to
a
regional
championship
.
In:O
the:O
beginning:O
the:O
PWF:organization-other
recognized:O
a:O
world:O
heavyweight:O
championship:O
and:O
several:O
``:O
regional:O
championships:O
'':O
given:O
as:O
billing:O
to:O
foreign:O
stars:O
depending:O
from:O
which:O
region:O
they:O
came:O
from:O
,:O
but:O
after:O
All:organization-sportsleague
Japan:organization-sportsleague
joined:O
the:O
National:organization-sportsleague
Wrestling:organization-sportsleague
Alliance:organization-sportsleague
(:O
NWA:organization-sportsleague
):O
,:O
the:O
PWF:organization-other
world:O
title:O
was:O
downgraded:O
to:O
a:O
regional:O
championship:O
.:O