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
participated
in
operations
against
guerrillas
in
Gilmer
,
Calhoun
and
Braxton
Counties
and
railroad
guard
duty
until
August
.
It:O
participated:O
in:O
operations:O
against:O
guerrillas:O
in:O
Gilmer:location-GPE
,:O
Calhoun:location-GPE
and:O
Braxton:location-GPE
Counties:O
and:O
railroad:O
guard:O
duty:O
until:O
August:O
.:O