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A smooth , eventually constant path to the identity gives a second more elementary way of extending a diffeomorphism from the circle to the open unit disc ( a special case of the Alexander trick ) .
 person: Alexander
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: Alexander