With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
The
riflemen
carried
additional
ammunition
,
hand
grenades
,
explosive
charges
or
a
machine
gun
tripod
as
required
and
provided
security
and
covering
fire
for
the
machine
gun
team
.
The:O
riflemen:O
carried:O
additional:O
ammunition:O
,:O
hand:O
grenades:O
,:O
explosive:O
charges:O
or:O
a:O
machine:O
gun:O
tripod:O
as:O
required:O
and:O
provided:O
security:O
and:O
covering:O
fire:O
for:O
the:O
machine:O
gun:O
team:O
.:O