听写参考文本： Feb 2nd, 1990, South Africa's President F.W. de Klerk lifts a ban on the African National Congress and promises to free Nelson Mandela. 1943, in a major win for the Soviets during World War II, the last of Nazi forces in the Battle of Stalingrad, surrender. 1996, “I am singing in the rain, just singing in the rain.” Gene Kelly, dancer, actor and choreographer, known for “Singin' in the Rain” and so much more, dies at age 83. And 1979, punk rock musician Sid Vicious of the Sex Pistols, dies of drug overdose in New York at age 21.