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His colleague Karl Pearson once said : " The creative mind has the potentiality of poet , artist and scientist within its grasp , and Goring 's friends were never very certain in which category to place him . "
 Karl Pearson, Goring
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Karl Pearson, Goring