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The concept of playing solo steel-string guitar in a concert setting was introduced in the early 1960 s by such performers as Davey Graham and John Fahey , who used country blues fingerpicking techniques to compose original compositions with structures somewhat like European classical music .
 person: Davey Graham; person: John Fahey
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Davey Graham; person: John Fahey