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In mathematics , " differential rings " , " differential fields " , and " differential algebras " are rings , fields , and algebras equipped with finitely many derivations , which are unary functions that are linear and satisfy the Leibniz product rule .
 person: Leibniz
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Leibniz