With no explanation, label each line with "location-GPE", "O", "organization-company", "organization-government/governmentagency", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
On
1
March
1997
the
Government
of
Bolivia
entered
into
a
25-year
contract
with
Airport
Group
International
to
operate
the
three
largest
airports
in
Bolivia
–
El
Alto
International
Airport
in
La
Paz
,
Jorge
Wilstermann
Airport
and
Viru
Viru
International
Airport
in
Santa
Cruz
de
la
Sierra
.
On:O
1:O
March:O
1997:O
the:O
Government:organization-government/governmentagency
of:organization-government/governmentagency
Bolivia:organization-government/governmentagency
entered:O
into:O
a:O
25-year:O
contract:O
with:O
Airport:organization-company
Group:organization-company
International:organization-company
to:O
operate:O
the:O
three:O
largest:O
airports:O
in:O
Bolivia:location-GPE
–:O
El:organization-company
Alto:organization-company
International:organization-company
Airport:organization-company
in:O
La:location-GPE
Paz:location-GPE
,:O
Jorge:organization-company
Wilstermann:organization-company
Airport:organization-company
and:O
Viru:organization-company
Viru:organization-company
International:organization-company
Airport:organization-company
in:O
Santa:location-GPE
Cruz:location-GPE
de:location-GPE
la:location-GPE
Sierra:location-GPE
.:O