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
whole
site
was
cleared
in
1975
.
The:O
whole:O
site:O
was:O
cleared:O
in:O
1975:O
.:O