text: This leader spent three days in house arrest during an event masterminded by the "Gang of Eight.
full_question: This leader spent three days in house arrest during an event masterminded by the "Gang of Eight." More than a hundred civilians were killed on Black January after this leader ordered an invasion of Baku. This leader encouraged small-scale private ownership with his Law on Cooperatives and urged economic acceleration with his slogan uskoreniye. Cartoonists often poked fun at the port wine-colored (*) birthmark on this leader's forehead. A coup against this man was defeated by his successor, who spoke from atop the turret of a tank. This leader withdrew his country's troops from Afghanistan and pursued the duel policies of "openness" and "restructuring." For 10 points, name this coiner of the terms glasnost and perestroika, the final leader of the Soviet Union.
first_sentence: This leader spent three days in house arrest during an event masterminded by the "Gang of Eight.
raw_answer: Mikhail Gorbachev [or Mikhail Sergeyevich Gorbachev] 