With no explanation, label each line with "person-soldier", "O", "location-mountain", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
On
July
31
,
1874
,
the
wagon
train
reached
Harney
Peak
(
now
Black
Elk
Peak
)
,
and
Custer
together
with
Ludlow
took
three
or
four
men
to
climb
it
.
On:O
July:O
31:O
,:O
1874:O
,:O
the:O
wagon:O
train:O
reached:O
Harney:location-mountain
Peak:location-mountain
(:O
now:O
Black:location-mountain
Elk:location-mountain
Peak:location-mountain
):O
,:O
and:O
Custer:person-soldier
together:O
with:O
Ludlow:person-soldier
took:O
three:O
or:O
four:O
men:O
to:O
climb:O
it:O
.:O