With no explanation, label each line with "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
These
rifles
were
issued
to
second-line
troops
to
free
up
rifles
in
their
main
caliber
from
front
line
duties
for
the
Franco-Thai
War
.
These:O
rifles:O
were:O
issued:O
to:O
second-line:O
troops:O
to:O
free:O
up:O
rifles:O
in:O
their:O
main:O
caliber:O
from:O
front:O
line:O
duties:O
for:O
the:O
Franco-Thai:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
.:O