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 ":".
There
have
been
numerous
proposed
timber
sales
in
the
area
.
There:O
have:O
been:O
numerous:O
proposed:O
timber:O
sales:O
in:O
the:O
area:O
.:O