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In addition , there are a number of key reasons why the principle of caveat emptor should prevail in regard to color psychology , especially in regard to information about colour psychology found in mainstream media and popular culture ( O'Connor , 2011 ) .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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