Historical clue formulations

• Anti-apartheid activist Steve — 2020-01-23
• Anti-apartheid activist Steve — 2013-11-28
• Soweto uprising figure — 2012-12-09
• Steven ___, subject of "Cry Freedom" — 2010-07-14
• Steven ___, real-life subject of the 1987 film "Cry Freedom" — 2007-06-19
• Anti-apartheid activist Steven — 1997-09-02