Complex sentence: There are two children, Benedito and Zeca, who seem to follow Orpheus around throughout the plot (especially Benedito) who believes that it is Orpheus's guitar that causes the sun to rise in the morning.
Split into simpler sentences: There are two children, Benedito and Zeca, who follow Orpheus around throughout the plot. They believe that it is Orpheus's guitar that causes the sun to rise in the morning.