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
famine
caused
many
deaths
over
an
extended
number
of
years
and
marked
a
clear
end
to
the
period
of
growth
and
prosperity
from
the
11th
to
the
13th
centuries
.
The:O
famine:O
caused:O
many:O
deaths:O
over:O
an:O
extended:O
number:O
of:O
years:O
and:O
marked:O
a:O
clear:O
end:O
to:O
the:O
period:O
of:O
growth:O
and:O
prosperity:O
from:O
the:O
11th:O
to:O
the:O
13th:O
centuries:O
.:O