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
upstream
oil
and
gas
analysis
and
outlook
report
provides
complete
information
on
Bahrain
exploration
and
production
blocks
,
fields
,
companies
and
future
prospects
.
Answer: 
Bahrain:B-LOC
upstream:O
oil:O
and:O
gas:O
analysis:O
and:O
outlook:O
report:O
provides:O
complete:O
information:O
on:O
Bahrain:B-LOC
exploration:O
and:O
production:O
blocks:O
,:O
fields:O
,:O
companies:O
and:O
future:O
prospects:O
.:O