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
cemetery
is
52
acres
in
size
.
The:O
cemetery:O
is:O
52:O
acres:O
in:O
size:O
.:O