Complex sentence: In October and November 2012 star1 will receive 15 Airbus A321-200s and 10 Airbus A330-300s with an average age of 4.1 years.
Split into simpler sentences: In October and November 2012 star1 will receive 15 Airbus A321-200s and 10 Airbus A330-300s. Star1's fleet has an average age of 4.1 years.