"Boston Symphony Orchestra" . "symphony orchestra performance" . . . "Note that handwritten insert lists indentical encore (Ravel's \"Alborada del Gracioso\") 4/12 and 4/13/1989 performances. It has only been entered on the 4/12/1989 program entry." . . . "1989-04-13T20:00:00"^^ . . . . . .