Simplify the following text for a Grade 7 native English-speaking person.
Original: John Caesar ( 1764 â `` 15 February 1796 ) , nicknamed `` Black Caesar '' , was the first Australian bushranger and one of the first black people to arrive during British colonisation of the continent as a penal colony .
Simplified: John Caesar ( 1764 â `` 15 February 1796 ) , known as `` Black Caesar '' , was the first Australian bushranger .