ROME (AP).- Martin Scorsese hailed “La Dolce Vita” as changing world cinema forever as he presented the restored version Saturday of Federico Fellini’s back-and-white classic. Scorsese, who was 18 when “La Dolce Vita” first came out in 1960, spoke of the impact the movie had on him and of the importance of preserving films for future generations. His institute for the preservation of film treasures, the Film Foundation, helped restore it. “We have an obligation to the future, we have an obligation to our children to at least let them know this is here, this is what it was like,” Scorsese told a press conference at the Rome Film Festival. “This is grand opera from Italy in the late 19th century.” Scorsese described “La Dolce Vita” as a landmark work both in world cinema and in Fellini’s own production. The movie broke narrative rules in that “there’s no story, there’s no plot, and the film is an epic length — three hours,” Scorsese said. It said it had “a moral