263707
It was there that Delmark Records boss Bob Koester first heard Burns perform , and agreed to record him after hearing only one set of music .
 Delmark Records, Bob Koester, Burns
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Delmark Records, Bob Koester, Burns