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: Company
:
Keio
Plaza
Hotel
Tokyo
Thursday
,
August
20
,
2015
10:35
AM
IST
(
5:05
AM
GMT
)
Keio
Plaza
Hotel
Tokyo
Hosts
A
Photo
Exhibition
Answer: 
Company:O
::O
Keio:B-ORG
Plaza:I-ORG
Hotel:I-ORG
Tokyo:I-ORG
Thursday:O
,:O
August:O
20:O
,:O
2015:O
10:35:O
AM:O
IST:O
(:O
5:05:O
AM:O
GMT:O
):O
Keio:B-ORG
Plaza:I-ORG
Hotel:I-ORG
Tokyo:I-ORG
Hosts:O
A:O
Photo:O
Exhibition:O