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In May 2015 , she announced her Las Vegas residency concert show , which commenced on January 20 , 2016 , the first of twenty initial dates .
 location: Las Vegas
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 location: Las Vegas