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However , his published enumeration only includes the 13 uniform polyhedra , and the first clear statement of the pseudorhombicuboctahedron 's existence was made in 1905 , by Duncan Sommerville .
 Duncan Sommerville
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Duncan Sommerville