200427
He began working with Art Tatum late in the 1940s , taking Tiny Grimes 's spot in his trio alongside bassist Slam Stewart .
 Art Tatum, Tiny Grimes, Slam Stewart
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Art Tatum, Tiny Grimes, Slam Stewart