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 ":".
In
a
radically
different
approach
,
American
officers
and
men
were
first
allowed
to
land
unmolested
and
then
shelled
and
machine
gunned
from
underground
bunkers
.
In:O
a:O
radically:O
different:O
approach:O
,:O
American:location-GPE
officers:O
and:O
men:O
were:O
first:O
allowed:O
to:O
land:O
unmolested:O
and:O
then:O
shelled:O
and:O
machine:O
gunned:O
from:O
underground:O
bunkers:O
.:O