7603
The first one in the United States opening in Chicago , Illinois , in May 2001 when there were about 300 worldwide .
 location: United States; location: Chicago; location: Illinois
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: United States; location: Chicago; location: Illinois