 Complete the following phrase:  During the 1960s many prominent groups emerged such as: Grupa 220, Crveni koralji and Roboti. The latter featured Ivica Percl, who after leaving Roboti in September 1966 because they were too loud, became a protest singer-songwriter influenced by the acoustic sound of Bob Dylan, Donovan and Joan Baez. In the same year, the internationally acclaimed Croatian chanson-influenced singer Tereza Kesovija represented Monaco in the 