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When Robert Hooke discovered Hooke 's law in 1660 , he first published it in anagram form , " , for " ( Latin : as the extension , so the force ) .
 Robert Hooke, Hooke
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Robert Hooke, Hooke