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: It
does
,
however
,
say
mountains
about
Europe
's
ability
to
cope
with
problems
and
that
there
are
potentially
serious
problems
with
the
structure
of
the
eurozone
.
Answer: 
It:O
does:O
,:O
however:O
,:O
say:O
mountains:O
about:O
Europe:B-LOC
's:O
ability:O
to:O
cope:O
with:O
problems:O
and:O
that:O
there:O
are:O
potentially:O
serious:O
problems:O
with:O
the:O
structure:O
of:O
the:O
eurozone:B-LOC
.:O