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He was Julia Child and Simone Beck 's teacher for the bread chapter of Mastering the Art of French Cooking volume 2 , as well as an advisor to the Bread Bakers Guild of America during its founding and early competitive efforts in the early 1990s .
 Julia Child, Simone Beck, Bread Bakers Guild of America
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Julia Child, Simone Beck, Bread Bakers Guild of America