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Contrary to thinkers , including Newton , who maintained that space and time were real things or substances , Leibniz had arrived at a radically different understanding of the universe and the things found in it .
 person: Newton; person: Leibniz
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Newton, Leibniz 
Answer:
 person: Newton; person: Leibniz