 Complete the following phrase:  Spiral was composed in Madison, Connecticut in September 1968 and was premiered on 15 May 1969 at the Muzički Biennale Zagreb, with the oboist Heinz Holliger as the soloist. Holliger performed it subsequently in Saint-Paul de Vence, and on 10 July 1969 at the Cheltenham Music Festival. Between 14 March and 14 September 1970, Spiral was given 1300 times at 