Complex sentence: On 14 November 1946, Prime Minister Sutan Sjahrir reorganised the Polisi Istimewa into the Mobile Brigade (Mobrig), and this day is celebrated as the anniversary of this Blue Beret Corps.
Split into simpler sentences: On 14 November 1946, Prime Minister Sutan Sjahrir reorganised the "Polisi Istimewa" into the Mobile Brigade (Mobrig). This day is celebrated as the anniversary of this Blue Beret Corps.