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 ":".
A
circular
wall
encloses
the
two
peaks
of
the
hill
,
creating
a
double
acropolis
with
a
shallow
saddle
in
between
.
A:O
circular:O
wall:O
encloses:O
the:O
two:O
peaks:O
of:O
the:O
hill:O
,:O
creating:O
a:O
double:O
acropolis:O
with:O
a:O
shallow:O
saddle:O
in:O
between:O
.:O