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Not only have Safire established themselves in the UK but have been fortunate enough to break through to success in the U.S.A some highlights of their career being to receive an invitation from world famous illusionists Siegfried and Roy to appear in their World Magic Show at the renowned Tropicana Hotel in Las Vegas and also performing at the 20th Century Fox Plaza Hotel in Los Angeles .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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