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Two years later , Rozelle would build on this success as the NFL began a four-year experiment of playing on Monday night , scheduling one game in prime time on CBS during the 1966 and 1967 seasons , and two contests during each of the next two years .
 person: Rozelle; organization: NFL; organization: CBS
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: Rozelle, NFL, CBS 
Answer:
 person: Rozelle; organization: NFL; organization: CBS