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Dub music influenced electronic musical techniques later adopted by hip hop music , when Jamaican immigrant DJ Kool Herc in the early 1970 s introduced Jamaica 's sound system culture and dub music techniques to America .
 Kool Herc, Jamaica, America
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kool Herc, Jamaica, America