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The joint venture between America Online ( AOL ) and Bertelsmann AG has formed a new company to sell advertising space on AOL in Europe , a Bertelsmann official said on Tuesday .
 Bertelsmann, America Online, Bertelsmann AG, Europe, AOL, AOL
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 Bertelsmann, America Online, Bertelsmann AG, Europe, AOL, AOL