Complex sentence: From 1971 to 1974, he was the Yugoslav ambassador to Denmark, and in 1975 he was elected Deputy Speaker of the Yugoslav Federal Assembly, until he became the leader of the League of Communists of Kosovo in 1982.
Split into simpler sentences: From 1971 to 1974, he was the Yugoslav ambassador to Denmark. In 1975 he was elected Deputy Speaker of the Yugoslav Federal Assembly, and remained in that posistion until he became the leader of the League of Communists of Kosovo in 1982.