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The 2015 event took place on 8 November and was hosted by Nick Grimshaw and Demi Lovato at Wembley Arena .
 person: Nick Grimshaw; person: Demi Lovato; location: Wembley Arena
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:
 person: Nick Grimshaw; person: Demi Lovato; location: Wembley Arena