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
temperature
in
the
caves
is
a
constant
.
The:O
temperature:O
in:O
the:O
caves:O
is:O
a:O
constant:O
.:O