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
houses
were
liquidated
between
1992–1998
.
The:O
houses:O
were:O
liquidated:O
between:O
1992–1998:O
.:O