Complex sentence: In the last hours of the 2011 winter transfer window, Bergessio joined Italian team Calcio Catania, arriving on loan for the remainder of 2010--11--the Sicilians had the option to sign him player permanently at the conclusion of this loan agreement.
Split into simpler sentences: In the last hours of the 2011 winter transfer window, Bergessio joined Italian team Calcio Catania, arriving on loan for the remainder of 2010--11. The Sicilians had the option to sign him player permanently at the conclusion of this loan agreement.