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What relation is your brother's aunt's nephew's sister to you ?

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

What relation is your daughter's grandfather's son's aunt's father to you ?

What relation is your mother's sister's niece's aunt's brother in law's brother to you ?

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

What relation is your uncle's daughter's aunt's brother in law to you ?