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The first of these new developments was seized up by Edmond Laguerre and Arthur Cayley , who attempted to ascertain the generalized metric properties of projective space .
 person: Edmond Laguerre; person: Arthur Cayley
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: Edmond Laguerre; person: Arthur Cayley