He referred to this in his sitcom "The Groovy Fellers" with Rowland Rivron.

Entity and relation annotations:
id: 0
type: entity
value: text: Rowland Rivron
labels: <Person>
id: 1
type: entity
value: text: "The Groovy Fellers"
labels: <Work_of_art>
type: relation
to_id: 1
labels: Person:performs:Work_of_art
from_id: 0