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