During World War One, Leo joined the Navy for six months.

Entity and relation annotations:
id: 0
type: entity
value: text: World War One
labels: <Event>
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type: entity
value: text: Leo
labels: <Person>
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type: entity
value: text: the Navy
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labels: Person:participates_in:Event
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type: relation
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labels: Person:affiliated_with:Organization
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