who is the writer with notable works like blues ain't no mockin bird and blues ain't no mockin bird ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_notableWork dbr_Blues_Ain't_No_Mockin_Bird sep_dot var_uri dbo_notableWork dbr_Blues_Ain't_No_Mockin_Bird sep_dot var_uri a dbo_Writer brack_close