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 ":".
We
were
unable
to
find
anybody
interested
in
acquiring
the
game
''
.
We:O
were:O
unable:O
to:O
find:O
anybody:O
interested:O
in:O
acquiring:O
the:O
game:O
'':O
.:O