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: The
Athens
Stock
Exchange
has
plunged
22.86
%
this
morning
as
markets
reopen
for
the
first
time
in
five
weeks
.
Answer: 
The:O
Athens:B-ORG
Stock:I-ORG
Exchange:I-ORG
has:O
plunged:O
22.86:O
%:O
this:O
morning:O
as:O
markets:O
reopen:O
for:O
the:O
first:O
time:O
in:O
five:O
weeks:O
.:O