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 ":".
In
May
1947
,
467
out
of
a
total
of
521
passenger
cars
were
parked
and
not
needed
.
In:O
May:O
1947:O
,:O
467:O
out:O
of:O
a:O
total:O
of:O
521:O
passenger:O
cars:O
were:O
parked:O
and:O
not:O
needed:O
.:O