Harper became the ward of Green Arrow's alter ego, billionaire Oliver Queen.

Entity and relation annotations:
id: 0
type: entity
value: text: Harper
labels: <Person>
id: 1
type: entity
value: text: Oliver Queen
labels: <Person>
id: 2
type: entity
value: text: Green Arrow
labels: <Person>
id: 3
type: entity
value: text: billionaire
labels: <Title>
type: relation
to_id: 3
labels: Person:holds_title:Title
from_id: 1