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
fire
led
to
uniform
national
standards
in
fire
fighting
equipment
and
protocols
.
The:O
fire:O
led:O
to:O
uniform:O
national:O
standards:O
in:O
fire:O
fighting:O
equipment:O
and:O
protocols:O
.:O