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: Before
Shorten
took
questions
from
the
assembled
media
at
a
press
conference
about
crime
in
Canning
on
Thursday
,
he
made
this
observation
.
Answer: 
Before:O
Shorten:B-PER
took:O
questions:O
from:O
the:O
assembled:O
media:O
at:O
a:O
press:O
conference:O
about:O
crime:O
in:O
Canning:B-LOC
on:O
Thursday:O
,:O
he:O
made:O
this:O
observation:O
.:O