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
15
passengers
and
two
pilots
were
on
board
.
A:O
total:O
of:O
15:O
passengers:O
and:O
two:O
pilots:O
were:O
on:O
board:O
.:O