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 ":".
As
on
other
flights
of
the
era
,
small
children
were
allowed
on
their
parents
'
laps
,
without
separate
seats
or
seat
belts
.
As:O
on:O
other:O
flights:O
of:O
the:O
era:O
,:O
small:O
children:O
were:O
allowed:O
on:O
their:O
parents:O
':O
laps:O
,:O
without:O
separate:O
seats:O
or:O
seat:O
belts:O
.:O