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 ":".
A
total
of
2.2
million
cars
were
produced
.
A:O
total:O
of:O
2.2:O
million:O
cars:O
were:O
produced:O
.:O