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In the middle of the decade he toured Europe in Dave Liebman 's Lookout Farm ensemble with Richard Beirach , Jeff Williams , and Badal Roy .
 Dave Liebman, Richard Beirach, Jeff Williams, Badal Roy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Dave Liebman, Richard Beirach, Jeff Williams, Badal Roy