Complex sentence: On 18 February 2013, eight masked gunmen in two cars with police markings stole approximately €38 million worth of diamonds from a Swiss-bound Fokker 100 operated by Helvetic Airways on the apron at Brussels Airport, Belgium, just before 20:00 CET.
Split into simpler sentences: On 18 February 2013, eight masked gunmen, in two cars with police markings, stole approximately €38 million worth of diamonds from a Swiss-bound Fokker 100 operated by Helvetic Airways. The Fooker 100 was on the apron at Brussels Airport, Belgium, just before 20:00 CET.