51366
The 11-cell is a self-dual 4-polytope whose facets are not icosahedra , but are " hemi-icosahedra " & mdash ; that is , they are the shape one gets if one considers opposite faces of the icosahedra to be actually the " same " face ( Grünbaum , 1977 ) .
 person: Grünbaum
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: Grünbaum 
Answer:
 person: Grünbaum