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Morse theory is another branch of differential topology , in which topological information about a manifold is deduced from changes in the rank of the Jacobian of a function .
 person: Jacobian
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: Jacobian