Complex sentence: Feuernacht was the starting point for a series of attacks throughout the 1960s, planned and carried out by a group called South Tyrolean Liberation Committee "(Befreiungsausschuss Südtirol (BAS))", led by Sepp Kerschbaumer.
Split into simpler sentences: Feuernacht was the starting point for a series of attacks throughout the 1960s. Planned and carried out by a group called "Befreiungsausschuss Südtirol" South Tyrolean Liberation Committee, led by Sepp Kerschbaumer.