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Eddington believed he had identified an algebraic basis for fundamental physics , which he termed " E-numbers " ( representing a certain group " – a Clifford algebra ) .
 person: Eddington; person: Clifford
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: Eddington; person: Clifford