Task: Text Simplification
Input (English): It has been originally created by the " groupement des e ́ coles ae ́ ronautiques franc ̧ aises " ( group of French aeronautical " grandes e ́ coles " ) ( ENAC , ENSMA and ISAE ) in 1998 .
Output (English): It has been created in 1998 by the French National aeronautical universities ( ENAC , ENSMA and ISAE ) .