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The following year , he signed a one-year contract with the Dallas Mavericks , but was released almost immediately after Don Nelson became General Manager .
 organization: Dallas Mavericks; person: Don Nelson
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:
 organization: Dallas Mavericks; person: Don Nelson