4520
He is a founding member of the sludge metal band Crowbar , and a founding member of the heavy metal supergroup Down , playing with them from 1991 to 2013 and later rejoining the band in 2020 .
 Crowbar, Down
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Crowbar, Down