208603
Featuring guest vocals by Trinidadian recording artist Nicki Minaj , the song was written by her , Usher , Ester Dean , Blac Elvis and Polow da Don , the latter two producing the track .
 person: Nicki Minaj; person: Usher; person: Ester Dean; person: Blac Elvis; person: Polow da Don
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Nicki Minaj, Usher, Ester Dean, Blac Elvis, Polow da Don 
Answer:
 person: Nicki Minaj; person: Usher; person: Ester Dean; person: Blac Elvis; person: Polow da Don