4950
On July 31 , 2006 , he performed a free concert in Rome , with the Colosseum as the backdrop .
 location: Rome; location: Colosseum
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: Rome; location: Colosseum