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
communists
envisioned
a
net
of
lunch
rooms
called
``
bufet
''
for
the
workers
at
various
companies
,
and
milk
bars
for
the
public
.
The:O
communists:O
envisioned:O
a:O
net:O
of:O
lunch:O
rooms:O
called:O
``:O
bufet:O
'':O
for:O
the:O
workers:O
at:O
various:O
companies:O
,:O
and:O
milk:O
bars:O
for:O
the:O
public:O
.:O