Complex sentence: Another Camerana, named Boniface, distinguished himself in the revolution of the Sicilian Vespers, led the insurretion vs the Angevins of about three thousand people from Corleone, helping for first the city of Palermo.
Split into simpler sentences: Another Camerana, named Boniface, distinguished himself in the revolution of the Sicilian Vespers. He led the insurrection against the Angevins with three thousand people from Corleone, in alliance with the city of Palermo.