The electric piano is a Hohner Pianet, played by John Lennon.

Entity and relation annotations:
id: 0
type: entity
value: text: John Lennon
labels: <Person>
id: 1
type: entity
value: text: Hohner Pianet
labels: <Production>
id: 2
type: entity
value: text: Hohner
labels: <Organization>
type: relation
to_id: 1
labels: Person:owns/uses:Production
from_id: 0
type: relation
to_id: 1
labels: Organization:develops/produces/sells:Production
from_id: 2