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There are 3 types of dihedral symmetry in three dimensions , each shown below in 3 notations : Schönflies notation , Coxeter notation , and orbifold notation .
 person: Schönflies; person: Coxeter
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: Schönflies; person: Coxeter