With no explanation, label each line with "location-GPE", "O", "location-bodiesofwater", "location-mountain", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Despite
their
best
efforts
,
early
American
fur
companies
in
this
region
had
difficulty
maintaining
the
long-distance
supply
lines
from
the
Missouri
River
system
into
the
Intermountain
West
.
Despite:O
their:O
best:O
efforts:O
,:O
early:O
American:location-GPE
fur:O
companies:O
in:O
this:O
region:O
had:O
difficulty:O
maintaining:O
the:O
long-distance:O
supply:O
lines:O
from:O
the:location-bodiesofwater
Missouri:location-bodiesofwater
River:location-bodiesofwater
system:O
into:O
the:location-mountain
Intermountain:location-mountain
West:location-mountain
.:O