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 ":".
Custer
and
his
force
entered
the
Black
Hills
from
the
north
,
travelling
south
at
a
slow
pace
of
no
more
than
four
or
five
miles
a
day
on
some
occasions
.
Custer:person-soldier
and:O
his:O
force:O
entered:O
the:O
Black:location-mountain
Hills:location-mountain
from:O
the:O
north:O
,:O
travelling:O
south:O
at:O
a:O
slow:O
pace:O
of:O
no:O
more:O
than:O
four:O
or:O
five:O
miles:O
a:O
day:O
on:O
some:O
occasions:O
.:O