It was written by Brendan Eich, who also wrote the first JavaScript engine, SpiderMonkey.

Entity and relation annotations:
id: 0
type: entity
value: text: SpiderMonkey
labels: <Production>
id: 1
type: entity
value: text: Brendan Eich
labels: <Person>
type: relation
to_id: 0
labels: Person:creates:Production
from_id: 1