His uncle, Morris Koppelman, held a patent for inventing the Egg carton.

Entity and relation annotations:
id: 0
type: entity
value: text: Morris Koppelman
labels: <Person>
id: 1
type: entity
value: text: the Egg carton
labels: <Production>
type: relation
to_id: 1
labels: Person:creates:Production
from_id: 0