With no explanation, label each line with "O", "location-road/railway/highway/transit", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
Hetch
Hetchy
Road
drops
into
the
valley
at
the
dam
,
but
all
points
east
of
there
are
roadless
,
and
accessible
only
to
hikers
and
equestrians
.
The:O
Hetch:location-road/railway/highway/transit
Hetchy:location-road/railway/highway/transit
Road:location-road/railway/highway/transit
drops:O
into:O
the:O
valley:O
at:O
the:O
dam:O
,:O
but:O
all:O
points:O
east:O
of:O
there:O
are:O
roadless:O
,:O
and:O
accessible:O
only:O
to:O
hikers:O
and:O
equestrians:O
.:O