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Death was a garage rock and protopunk demo band formed in Detroit , Michigan , in 1971 by the brothers Bobby ( bass , vocals ) , David ( guitar ) , and Dannis ( drums ) Hackney .
 Detroit , Michigan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Detroit , Michigan