rtokens: Naina Yeltsin had a kidney operation last Saturday .
pos: NNP NNP NNP NNP VBD PRP$ NN NNP IN NN IN NNP NN , NNP NN NN VBD NN NNP NNP IN VBG .
tokens: Russian President Boris Yeltsin visited his wife Naina in hospital on Friday evening , Interfax news agency quoted spokesman Sergei Yastrzhembsky as saying .
ltokens: MOSCOW 1996-08-30