In the list of tokens, identify 'Person', 'Location', and 'Organisation' and label each accordingly. If the entity spans multiple tokens, use the prefix B-PER, B-LOC, or B-ORG for the first token, and I-PER, I-LOC, or I-ORG for the subsequent tokens of that entity. The beginning of each separate entity should always be labeled with a B-PER, B-LOC, or B-ORG prefix. If the token does not fit into any of the three named categories, or is not a named entity, label it as 'O'. Each line should contain one token and its corresponding label, separated by a colon. Do not combine tokens on your own. The format for each line should be: 'token:label'.

Text: Bahrain
oil
and
gas
reserves
,
replacement
ratios
,
proven
volumes
along
with
detailed
insights
into
the
role
of
Bahrain
in
region
and
global
upstream
markets
is
provided
in
detail
.
Answer: 
Bahrain:B-LOC
oil:O
and:O
gas:O
reserves:O
,:O
replacement:O
ratios:O
,:O
proven:O
volumes:O
along:O
with:O
detailed:O
insights:O
into:O
the:O
role:O
of:O
Bahrain:B-LOC
in:O
region:O
and:O
global:O
upstream:O
markets:O
is:O
provided:O
in:O
detail:O
.:O