"Cornerstone" magazine also spawned the Cornerstone Festival.

Entity and relation annotations:
id: 0
type: entity
value: text: "Cornerstone"
labels: <Organization>
id: 1
type: entity
value: text: the Cornerstone Festival
labels: <Event>
id: 2
type: entity
value: text: Cornerstone
labels: <Organization>
type: relation
to_id: 1
labels: Organization:Organization:Event
from_id: 2