8752
Morse theory was used by Thom and Milnor to prove that every manifold ( with or without boundary ) is a handlebody , meaning that it has an expression as a union of handles .
 person: Thom; 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: Thom; person: Milnor