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
are
also
a
number
of
sports
airfields
.
There:O
are:O
also:O
a:O
number:O
of:O
sports:O
airfields:O
.:O