More than four million people voted in Italy 's first nationwide primary and made Romano Prodi , a former prime minister , the overwhelming choice of the center-left to challenge Prime Minister Silvio Berlusconi in the next general election .
Silvio Berlusconi /people/person/nationality Italy
Romano Prodi /people/person/nationality Italy
JJR IN CD CD NNS VBD IN NNP POS JJ JJ JJ CC VBD NNP NNP , DT JJ JJ NN , DT JJ NN IN DT JJ TO VB NNP NNP NNP NNP IN DT JJ JJ NN .
Silvio Berlusconi
PERSON
Italy
LOCATION
/people/person/nationality
Romano Prodi
PERSON
Italy
LOCATION
/people/person/nationality