Complex sentence: On 14 September 2011, an Embraer EMB 120 Brasilia, operated by the Angolan Air Force, crashed just after takeoff from Nova Lisboa Airport, killing 11 army officers (including three generals) and six civilians.
Split into simpler sentences: On 14 September 2011, an Embraer EMB 120 Brasilia, operated by the Angolan Air Force, crashed just after takeoff from Nova Lisboa Airport. The plane killed 11 army officers (including three generals) and six civilians.