rtokens: Surgeon Renat Akchurin who led the operation , told Itar-Tass news agency Yeltsin was working up to four hours a day at his residence .
pos: NNP VBZ VBN VBN DT JJ NNS IN NN IN PRP$ RB VB IN NNP CD CC VBZ RB TO VB DT JJ NN CC NN NN TO DT NN .
tokens: Yeltsin has been shown a few times on television since his quintuple bypass on November 5 but has yet to deliver any major television or radio address to the nation .
ltokens: He took over there , and took control of the red button controlling nuclear arms , in December 1991 when Mikhail Gorbachev resigned , marking the end of the Soviet Union .