It is also mentioned in Anna Komnene's "Alexiad".

Entity and relation annotations:
id: 0
type: entity
value: text: Anna Komnene
labels: <Person>
id: 1
type: entity
value: text: "Alexiad"
labels: <Work_of_art>
type: relation
to_id: 1
labels: Person:creates:Work_of_art
from_id: 0