With no explanation, label each line with "location-GPE", "person-soldier", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
About
this
time
,
the
(
Federal
)
Army
of
the
Southwest
under
Major
General
Samuel
R.
Curtis
had
been
operating
in
the
interior
of
Arkansas
.
About:O
this:O
time:O
,:O
the:O
(:O
Federal:O
):O
Army:O
of:O
the:O
Southwest:O
under:O
Major:O
General:O
Samuel:person-soldier
R.:person-soldier
Curtis:person-soldier
had:O
been:O
operating:O
in:O
the:O
interior:O
of:O
Arkansas:location-GPE
.:O