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His language , which he described as " Visual Mathematics " and " Design Science , " led to lifelong collaboration with innovators such as R. Buckminster Fuller and M.C. Escher .
 M.C. Escher
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 M.C. Escher