Gouzenko's defection "ushered in the modern era of Canadian security intelligence".

Entity and relation annotations:
id: 0
type: entity
value: text: Gouzenko
labels: <Person>
id: 1
type: entity
value: text: Gouzenko's defection
labels: <Event>
type: relation
to_id: 1
labels: Person:participates_in:Event
from_id: 0