Duncan worked for Rich in London and Singapore.

Entity and relation annotations:
id: 0
type: entity
value: text: Duncan
labels: <Person>
id: 1
type: entity
value: text: London
labels: <Location>
id: 2
type: entity
value: text: Singapore
labels: <Location>
id: 3
type: entity
value: text: Rich
labels: <Organization>
type: relation
to_id: 3
labels: Person:affiliated_with:Organization
from_id: 0
type: relation
to_id: 1
labels: Person:works_at:Location
from_id: 0
type: relation
to_id: 2
labels: Person:works_at:Location
from_id: 0