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
country
which
is
now
very
sparsely
populated
,
in
Roman
times
supported
a
great
population
.
The:O
country:O
which:O
is:O
now:O
very:O
sparsely:O
populated:O
,:O
in:O
Roman:O
times:O
supported:O
a:O
great:O
population:O
.:O