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The so-called Mura dell ' Arce ( cyclopean walls ) date probably from the 6th-5th century BC , and aerial photography has revealed further stretches , which show the political and commercial importance of Vetulonia , which was famous for its goldsmiths .
 Vetulonia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Vetulonia