181099
Songs from Johnson 's first album had been covered by popular rock artists in the late sixties , including Eric Clapton and Led Zeppelin , who based their " Lemon Song " partly on " Traveling Riverside Blues . "
 Johnson, Eric Clapton
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Johnson, Eric Clapton