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
optimisation
work
has
achieved
its
aim
of
reducing
delivery
risk
and
operating
costs
estimates
through
detailed
planning
and
improved
flexibility
,
especially
in
the
new
mine
design
,
’’
he
said
.
Answer: 
“:O
The:O
optimisation:O
work:O
has:O
achieved:O
its:O
aim:O
of:O
reducing:O
delivery:O
risk:O
and:O
operating:O
costs:O
estimates:O
through:O
detailed:O
planning:O
and:O
improved:O
flexibility:O
,:O
especially:O
in:O
the:O
new:O
mine:O
design:O
,:O
’’:O
he:O
said:O
.:O