It is based on the play "Die Fahne" by Emmerich Groh.

Entity and relation annotations:
id: 0
type: entity
value: text: Emmerich Groh
labels: <Person>
id: 1
type: entity
value: text: "Die Fahne"
labels: <Work_of_art>
type: relation
to_id: 1
labels: Person:creates:Work_of_art
from_id: 0