He joined the Fatherland Party during World War One.

Entity and relation annotations:
id: 0
type: entity
value: text: the Fatherland Party
labels: <Organization>
id: 1
type: entity
value: text: during World War One
labels: <Date>
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type: entity
value: text: World War One
labels: <Event>
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labels: Organization:Engagement:Event
from_id: 0