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What relation is your sister's aunt's niece's uncle to you ?

What relation is your mother's husband's son's niece to you ?

What relation is your cousin's sister's mother's daughter to you ?

What relation is your cousin's aunt's niece's father's daughter's brother in law to you ?

What relation is your uncle's son's aunt's daughter's mother to you ?

What relation is your daughter's grandfather's son's sister in law to you ?