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In December 2008 it was discovered to be a Ponzi scheme , and closed as part of the Madoff investment scandal .
 person: Madoff
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: Madoff 
Answer:
 person: Madoff