[relationship] (2 [relationship links])
Marvin Burk [is]
[[[a great-uncle of [the spouse]] of Etienne Sepulchre].
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[indeed,]
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William Knowles Burk
(1 [relationship link])
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Clara C. Coryell
(1 [relationship link])
[are] [at the same time]
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[[[great-grand-parents] of [the spouse]] of Etienne Sepulchre]
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[[the parents] of Marvin Burk]