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Some pointed to the recent demise of two instant messaging competitors _ iCAST and Tribal Voice _ as evidence that AOL ' s dominance could prevent choices in the market .
 organization: two instant messaging competitors; organization: iCAST; organization: Tribal Voice; organization: AOL; person: Some
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 organization: two instant messaging competitors; organization: iCAST; organization: Tribal Voice; organization: AOL; person: Some