With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Most
of
the
U.S
.
's
taller
dams
are
located
in
the
west
because
of
the
steeper
and
more
rugged
topography
.
Most:O
of:O
the:O
U.S:location-GPE
.:location-GPE
's:O
taller:O
dams:O
are:O
located:O
in:O
the:O
west:O
because:O
of:O
the:O
steeper:O
and:O
more:O
rugged:O
topography:O
.:O