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
back
is
usually
long
,
and
the
croup
is
sloping
.
The:O
back:O
is:O
usually:O
long:O
,:O
and:O
the:O
croup:O
is:O
sloping:O
.:O