With no explanation, label each line with "organization-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
SAC
bases
with
large
concentrations
of
bombers
made
attractive
targets
.
SAC:organization-other
bases:O
with:O
large:O
concentrations:O
of:O
bombers:O
made:O
attractive:O
targets:O
.:O