With no explanation, label each line with "location-GPE", "O", "location-mountain", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
As
it
descends
from
the
Guiana
Highlands
the
river
runs
south-east
,
past
Issano
,
then
northward
to
Bartica
.
As:O
it:O
descends:O
from:O
the:O
Guiana:location-mountain
Highlands:location-mountain
the:O
river:O
runs:O
south-east:O
,:O
past:O
Issano:location-GPE
,:O
then:O
northward:O
to:O
Bartica:location-GPE
.:O