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In 1963 he joined Jim Kweskin 's Boston - based jug band as a banjo and harmonica playerLyman , once called “ the Grand Old Man of the ‘ blues ’ harmonica in his mid-twenties " , is remembered in folk music circles for playing a 20 minute improvisation on the traditional hymn " Rock of Ages " at the end of the 1965 Newport Folk Festival to the riled crowd streaming out after Bob Dylan 's famous appearance with an electric band .
 Jim Kweskin, Boston, Bob Dylan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Jim Kweskin, Boston, Bob Dylan