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Bernbach 's team of " agency creatives " was headed by Helmut Krone , who pioneered the idea of simplicity in print media advertisements .
 Bernbach, Helmut Krone
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bernbach, Helmut Krone