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On 25 October 2011 , Silvio Berlusconi nominated Ignazio Visco to be the bank 's new governor to replace Mario Draghi when he left to become president of the European Central Bank in November .
 person: Silvio Berlusconi; person: Ignazio Visco; person: Mario Draghi; organization: European Central Bank
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Silvio Berlusconi, Ignazio Visco, Mario Draghi, European Central Bank 
Answer:
 person: Silvio Berlusconi; person: Ignazio Visco; person: Mario Draghi; organization: European Central Bank