With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
It
was
established
by
the
U.S
.
Army
as
an
auxiliary
field
and
bombing
range
in
1938
,
and
activated
as
a
designated
installation
in
1941
.
It:O
was:O
established:O
by:O
the:O
U.S:location-GPE
.:location-GPE
Army:O
as:O
an:O
auxiliary:O
field:O
and:O
bombing:O
range:O
in:O
1938:O
,:O
and:O
activated:O
as:O
a:O
designated:O
installation:O
in:O
1941:O
.:O