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
steamship
line
supplied
chassis
to
its
customers
and
contractors
for
``
free
''
.
A:O
steamship:O
line:O
supplied:O
chassis:O
to:O
its:O
customers:O
and:O
contractors:O
for:O
``:O
free:O
'':O
.:O