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Discovery The bones of Besanosaurus were first discovered in " Sasso Caldo " quarry in the spring of 1993 by the volunteers of the paleontological group of Besano , a small town in the Lombardy region of north Italy .
 Besano, Lombardy, Italy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
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Answer:
 Besano, Lombardy, Italy