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On Alberto 's death in 1301 , Cangrande was entrusted to the guardianship of his eldest brother Bartolomeo I della Scala , in whose brief reign he probably first met Dante when the poet took refuge in Verona following his exile from Florence .
 Alberto, Cangrande, Bartolomeo I della Scala, Dante, Verona, Florence
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Alberto, Cangrande, Bartolomeo I della Scala, Dante, Verona, Florence