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 ":".
The
company
promoted
the
use
of
Grade
``
A
''
dairy
milk
in
its
ice
cream
,
while
comparable
producers
at
the
time
still
used
Grade
``
B
''
milk
.
The:O
company:O
promoted:O
the:O
use:O
of:O
Grade:O
``:O
A:O
'':O
dairy:O
milk:O
in:O
its:O
ice:O
cream:O
,:O
while:O
comparable:O
producers:O
at:O
the:O
time:O
still:O
used:O
Grade:O
``:O
B:O
'':O
milk:O
.:O