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British girl group the Sugababes were formed in 1998 by Siobhán Donaghy , Mutya Buena and Keisha Buchanan .
 Sugababes, Siobhán Donaghy, Mutya Buena, Keisha Buchanan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sugababes, Siobhán Donaghy, Mutya Buena, Keisha Buchanan