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
glaciers
in
the
higher
mountain
areas
today
are
not
remnants
of
the
large
ice
sheet
of
the
ice
age—their
origins
are
more
recent
.
The:O
glaciers:O
in:O
the:O
higher:O
mountain:O
areas:O
today:O
are:O
not:O
remnants:O
of:O
the:O
large:O
ice:O
sheet:O
of:O
the:O
ice:O
age—their:O
origins:O
are:O
more:O
recent:O
.:O