"benefit performance" . "Souvenir Debut Program | Benefit Concert in Cooperation with the New York Clinic for Mental Health\r\nWORLD PREMIERE of Edgard Varèse's DANCE FOR BURGESS (first concert performance)" . . "symphony orchestra performance" . . . . . . . "The Symphony of New York" . . . . "1968-12-19T20:30:00"^^ . .