Complex sentence: As of March 2012, the Thomas Cook Airlines Belgium fleet consists of 5 Airbus A320-200 and 1 Airbus A319-100, which are equipped with 180 and 144 economy class seats, respectively.
Split into simpler sentences: As of March 2012, the Thomas Cook Airlines Belgium fleet consists of 5 Airbus A320-200 and 1 Airbus A319-100. These aircraft are equipped with 180 and 144 economy class seats, respectively.