[relationship] (2 [relationship links])
Janet Ferguson [is]
[[a great-niece] of John Fosdick Clarkson].
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[indeed,]
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Guy Fosdick Clarkson
(1 [relationship link])
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Kathleen Eleanor Burk
(1 [relationship link])
[are] [at the same time]
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[[the parents] of John Fosdick Clarkson]
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[[great-grand-parents] of Janet Ferguson]