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 ":".
Germany
had
commenced
Operation
Fall
Gelb
and
attacked
the
Netherlands
,
Belgium
,
France
and
Luxembourg
,
in
the
case
of
the
Low
Countries
without
a
declaration
of
war
given
before
hostilities
;
France
was
already
at
war
.
Germany:O
had:O
commenced:O
Operation:O
Fall:O
Gelb:O
and:O
attacked:O
the:O
Netherlands:location-GPE
,:O
Belgium:location-GPE
,:O
France:location-GPE
and:O
Luxembourg:location-GPE
,:O
in:O
the:O
case:O
of:O
the:O
Low:O
Countries:O
without:O
a:O
declaration:O
of:O
war:O
given:O
before:O
hostilities:O
;:O
France:location-GPE
was:O
already:O
at:O
war:O
.:O