With no explanation, label each line with "location-GPE", "O", "organization-education", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
He
returned
home
for
assignments
to
the
Advanced
Flying
Schools
at
Stockton
,
Calif
.
,
and
Phoenix
,
Ariz
.
,
with
promotion
to
major
.
He:O
returned:O
home:O
for:O
assignments:O
to:O
the:O
Advanced:organization-education
Flying:organization-education
Schools:organization-education
at:O
Stockton:location-GPE
,:O
Calif:location-GPE
.:O
,:O
and:O
Phoenix:location-GPE
,:O
Ariz:location-GPE
.:O
,:O
with:O
promotion:O
to:O
major:O
.:O