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 ":".
The
Khumbu
Icefall
is
located
at
the
head
of
the
Khumbu
Glacier
and
the
foot
of
the
Western
Cwm
,
which
lies
at
an
altitude
of
on
the
Nepali
slopes
of
Mount
Everest
,
not
far
above
Base
Camp
and
southwest
of
the
summit
.
The:O
Khumbu:location-other
Icefall:location-other
is:O
located:O
at:O
the:O
head:O
of:O
the:O
Khumbu:location-other
Glacier:location-other
and:O
the:O
foot:O
of:O
the:O
Western:location-mountain
Cwm:location-mountain
,:O
which:O
lies:O
at:O
an:O
altitude:O
of:O
on:O
the:O
Nepali:location-mountain
slopes:O
of:O
Mount:location-mountain
Everest:location-mountain
,:O
not:O
far:O
above:O
Base:O
Camp:O
and:O
southwest:O
of:O
the:O
summit:O
.:O