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On 4 April 2013 , he shortly replaced the sacked Michel Vonk as manager of Sparta Rotterdam on a contract running until the end of the season .
 person: Michel Vonk; organization: Sparta Rotterdam
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Michel Vonk; organization: Sparta Rotterdam