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Gottfried Leibniz as part of his " solar vortex theory " conceived of centrifugal force as a real outward force which is induced by the circulation of the body upon which the force acts .
 person: Gottfried 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: Gottfried Leibniz