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Subsequently , Felix Klein studied projective geometry ( along with other types of geometry ) from the viewpoint that the geometry on a space is encoded in a certain class of transformations on the space .
 person: Felix Klein
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: Felix Klein