With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
In
the
21st
century
,
Khartoum
developed
based
on
Sudan
's
oil
wealth
(
although
the
independence
of
South
Sudan
in
2011
affected
the
economy
of
Sudan
negatively
)
.
In:O
the:O
21st:O
century:O
,:O
Khartoum:location-GPE
developed:O
based:O
on:O
Sudan:location-GPE
's:O
oil:O
wealth:O
(:O
although:O
the:O
independence:O
of:O
South:O
Sudan:location-GPE
in:O
2011:O
affected:O
the:O
economy:O
of:O
Sudan:location-GPE
negatively:O
):O
.:O