Dieter Stiller, his father, introduced the Klepper folding kayak to the United States.

Entity and relation annotations:
id: 0
type: entity
value: text: Dieter Stiller
labels: <Person>
id: 1
type: entity
value: text: the Klepper folding kayak
labels: <Production>
id: 2
type: entity
value: text: the United States
labels: <Location>