The RnP was composed of the Italian Democratic Socialists ( SDI ; a social-democratic party led by Enrico Boselli and Roberto Villetti ) , the Italian Radicals ( RI ; a liberal-libertarian party led by Marco Pannella and Emma Bonino ) and some independent members gathered in the Association for the Rose in the Fist ( including Lanfranco Turci , Salvatore Buglio , and Biagio De Giovanni ) .