3248
He constructed a smooth 7-dimensional manifold ( called now Milnor 's sphere ) that is homeomorphic to the standard 7-sphere but not diffeomorphic to it .
 person: Milnor
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: Milnor