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
Athex
Large
Cap
index
which
measure
the
performance
of
Greece
's
largest
listed
companies
closed
at
241.22
points
on
Friday
June
26
.
Answer: 
The:O
Athex:O
Large:O
Cap:O
index:O
which:O
measure:O
the:O
performance:O
of:O
Greece:O
's:O
largest:O
listed:O
companies:O
closed:O
at:O
241.22:O
points:O
on:O
Friday:O
June:O
26:O
.:O