With no explanation, label each line with "location-GPE", "O", "location-bodiesofwater", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
dam
and
reservoir
are
the
source
for
the
Hetch
Hetchy
Aqueduct
,
which
provides
water
for
over
two
million
people
in
San
Francisco
and
other
municipalities
of
the
west
Bay
Area
.
The:O
dam:O
and:O
reservoir:O
are:O
the:O
source:O
for:O
the:O
Hetch:location-bodiesofwater
Hetchy:location-bodiesofwater
Aqueduct:location-bodiesofwater
,:O
which:O
provides:O
water:O
for:O
over:O
two:O
million:O
people:O
in:O
San:location-GPE
Francisco:location-GPE
and:O
other:O
municipalities:O
of:O
the:O
west:O
Bay:location-GPE
Area:location-GPE
.:O