Complex sentence: The interview he made in April 1960 with Domenico Modugno, who had just won two Sanremo Festivals in a row, inspired Guccini to write "L'antisociale", his first song as a singer-songwriter.
Split into simpler sentences: The interview he made In April 1960, Guccini interviewed Domenico Modugno, who had just won two consecutive Sanremo Festivals. This inspired Guccini to write "L'antisociale", his first composition as a singer-songwriter.