With no explanation, label each line with "location-GPE", "building-other", "O", "location-mountain", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
In
the
1980s
the
Navajo
Generating
Station
at
Page
,
Arizona
,
(
15
miles
away
)
was
identified
as
the
primary
source
for
anywhere
from
fifty
percent
to
ninety
percent
of
the
Grand
Canyon
's
air
quality
problems
.
In:O
the:O
1980s:O
the:O
Navajo:building-other
Generating:building-other
Station:building-other
at:O
Page:location-GPE
,:O
Arizona:location-GPE
,:O
(:O
15:O
miles:O
away:O
):O
was:O
identified:O
as:O
the:O
primary:O
source:O
for:O
anywhere:O
from:O
fifty:O
percent:O
to:O
ninety:O
percent:O
of:O
the:O
Grand:location-mountain
Canyon:location-mountain
's:O
air:O
quality:O
problems:O
.:O