name the office holder who has a child named henrietta pelham-holles and resting place is westminster abbey ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_child dbr_Henrietta_Pelham-Holles,_Duchess_of_Newcastle-upon-Tyne sep_dot var_uri dbp_restingPlace dbr_Westminster_Abbey sep_dot var_uri a dbo_OfficeHolder brack_close