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The Velvet Revolution (Czech: sametová revoluce) or Gentle Revolution (Slovak: nežná revolúcia) was a non-violent transition of power in what was then Czechoslovakia, occurring from 17 November to 29 December 1989. ... On 27 November, a two-hour general strike involving all citizens of Czechoslovakia was held.
On June 29, 1947, as the first president to address the National Association for the Advancement of Colored People (NAACP), Harry Truman pledges his support for upholding the civil rights of all Americans.
Sieur de La Salle wa the one who named it .
They appose or point out other people's arguments