name the office holder with associate as bilawal bhutto zardari and has a kid named bilawal bhutto zardari ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_associate dbr_Bilawal_Bhutto_Zardari sep_dot var_uri dbo_child dbr_Bilawal_Bhutto_Zardari sep_dot var_uri a dbo_OfficeHolder brack_close