Complex sentence: From 1969 to 1981 Bedford was Composer in Residence at Queen's College, London, and from 1968 to 1980 taught music in a number of London secondary schools.
Split into simpler sentences: From 1969 to 1981, Bedford was Composer in Residence at Queen's College, London. From 1968 to 1980, he taught music in a number of London secondary schools.