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In higher dimensions , the Riemann curvature tensor is an important pointwise invariant associated with a Riemannian manifold that measures how close it is to being flat .
 person: Riemann; person: Riemannian
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: Riemann; person: Riemannian