sentence1: The airline was formed by Irelandia , which has also developed other five airlines , namely VivaColombia , Ryanair , Allegiant Air , VivaAerobus and Tigerair .
sentence2: The airline was established by Irelandia , which has also developed other five airlines , namely VivaColombia , Ryanair , Allegiant Air , VivaAerobus and Tigerair .