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In criminology , the focal concerns theory , posited in 1958 by Walter B. Miller , attempts to explain the behavior of " members of adolescent street corner groups in lower class communities " as being based around six focal concerns : trouble , toughness , smartness , excitement , fate , autonomy .
 Walter B. Miller
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Walter B. Miller