With no explanation, label each line with "O", "location-mountain", "location-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
It
caps
the
Allegheny
Front
and
has
kept
it
from
eroding
as
much
as
the
softer
Catskill
Formation
,
to
the
south
.
It:O
caps:O
the:O
Allegheny:location-mountain
Front:O
and:O
has:O
kept:O
it:O
from:O
eroding:O
as:O
much:O
as:O
the:O
softer:O
Catskill:location-other
Formation:location-other
,:O
to:O
the:O
south:O
.:O