Complex sentence: In 1972 the national airline of Serbia, Jat Airways (then known as JAT Yugoslav Airlines), now the Jat Airways Flight Academy, has been specialized for training future airline transport pilots at Vršac International Airport.
Split into simpler sentences: In 1972 the national airline of Serbia, Jat Airways (then known as JAT Yugoslav Airlins). Since then the Jat Airways Flight Academy has been specialized for training future airline transport pilots at Vršac International Airport.