Before Mr. Wolf there had been his friend -- and Mr. Gorbachev 's mentor -- Yuri Andropov , a longtime K.G.B. chief whose brief tenure at the helm of the Soviet Union was marked by a campaign against corruption , alcoholism , absenteeism and inefficiency .
Yuri Andropov /people/person/nationality Soviet Union
IN NNP NNP RB VBD VBN PRP$ NN : CC NNP NNP POS NN : NNP NNP , DT JJ NNP NN WP$ JJ NN IN DT NN IN DT NNP NNP VBD VBN IN DT NN IN NN , NN , NN CC NN .
Yuri Andropov
PERSON
Soviet Union
LOCATION
/people/person/nationality