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He signed to Roc-A-Fella Records in 1997 , and began work on his debut album which was tentatively titled , Medicine .
 organization: Roc-A-Fella Records
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: Roc-A-Fella Records 
Answer:
 organization: Roc-A-Fella Records