O'Brien is married to actress Miranda Otto, with whom he has a daughter.

Entity and relation annotations:
id: 0
type: entity
value: text: O'Brien
labels: <Person>
id: 1
type: entity
value: text: Miranda Otto
labels: <Person>
id: 2
type: entity
value: text: actress
labels: <Title>
type: relation
to_id: 1
labels: Person:family:Person
from_id: 0