Atal Bihari Vajpayee , a former prime minister of India , has announced his retirement from politics , ushering in an era of uncertainty for the country 's principal opposition party .
Atal Bihari Vajpayee /people/person/nationality India
NNP NNP NNP , DT JJ JJ NN IN NNP , VBZ VBN PRP$ NN IN NNS , VBG IN DT NN IN NN IN DT NN POS JJ NN NN .
Atal Bihari Vajpayee
PERSON
India
LOCATION
/people/person/nationality