With no explanation, label each line with "location-GPE", "O", "product-food", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Guinea-Bissau
is
the
world
's
fourth
largest
exporter
of
cashew
nuts
,
and
the
sector
accounts
for
90
%
of
the
country
's
income
and
employs
over
80
%
of
its
labour
force
making
it
vital
to
its
economy
.
Guinea-Bissau:location-GPE
is:O
the:O
world:O
's:O
fourth:O
largest:O
exporter:O
of:O
cashew:product-food
nuts:product-food
,:O
and:O
the:O
sector:O
accounts:O
for:O
90:O
%:O
of:O
the:O
country:O
's:O
income:O
and:O
employs:O
over:O
80:O
%:O
of:O
its:O
labour:O
force:O
making:O
it:O
vital:O
to:O
its:O
economy:O
.:O