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

What relation is your sister's aunt's daughter's father in law to you ?

What relation is your daughter's grandmother's husband's brother's son's daughter in law to you ?

What relation is your brother's sister's cousin's son to you ?

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

What relation is your daughter's grandfather's wife's husband's brother to you ?