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Sets of three continued to play an important part in the nineteenth century development of the categories , most notably in G.W.F. Hegel 's extensive tabulation of categories , and in C.S. Peirce 's categories set out in his work on the logic of relations .
 G.W.F. Hegel, C.S. Peirce
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 G.W.F. Hegel, C.S. Peirce