Complex sentence: Anton Theodor Eberhard August Lubowski (3 February 1952--12 September 1989) was a Namibiananti-apartheid activist advocate and SWAPO member assassinated by operatives of South Africa's Civil Cooperation Bureau.
Split into simpler sentences: Anton Theodor Eberhard August Lubowski (3 February 1952--12 September 1989) was a Namibian anti-apartheid activist and advocate. He was a member of the South West Africa People's Organization (SWAPO) In 1989 he was assassinated by operatives of South Africa's Civil Cooperation Bureau.