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: IMF
head
Christine
Lagarde
on
Wednesday
said
that
debt
restructuring
was
"
becoming
a
commonly
accepted
view
"
and
that
"
it
's
inevitable
that
there
is
an
element
of
debt
restructuring
"
.
Answer: 
IMF:B-ORG
head:O
Christine:B-PER
Lagarde:I-PER
on:O
Wednesday:O
said:O
that:O
debt:O
restructuring:O
was:O
":O
becoming:O
a:O
commonly:O
accepted:O
view:O
":O
and:O
that:O
":O
it:O
's:O
inevitable:O
that:O
there:O
is:O
an:O
element:O
of:O
debt:O
restructuring:O
":O
.:O