George Washington Riggs died at his home, Green Hill, in Prince George's County, Maryland.

Entity and relation annotations:
id: 0
type: entity
value: text: George Washington Riggs
labels: <Person>
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type: entity
value: text: Green Hill
labels: <Location>
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type: entity
value: text: Prince George's County
labels: <Location>
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type: entity
value: text: Maryland
labels: <Location>
type: relation
to_id: 1
labels: Person:died_at:Location
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type: relation
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labels: Location:located_in:Location
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