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It began on May 6 at The O2 Arena in London , and concluded on June 22 at the Ziggo Dome in Amsterdam .
 location: The O2 Arena; location: London; organization: Ziggo Dome; location: Amsterdam
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:
 location: The O2 Arena; location: London; organization: Ziggo Dome; location: Amsterdam