Prova is derived from Mandarax, a Java-based inference system developed by Jens Dietrich.

Entity and relation annotations:
id: 0
type: entity
value: text: Prova
labels: <Production>
id: 1
type: entity
value: text: Mandarax
labels: <Production>
id: 2
type: entity
value: text: Jens Dietrich
labels: <Person>
type: relation
to_id: 1
labels: Person:creates:Production
from_id: 2