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Richard is best known for his vocal work in Electronic Dance Music including collaborations on Above & Beyond 's 2011 album Group Therapy , their 2006 album Tri-state , Armin van Buuren 's forthcoming album Intense and IDMA Nominated singles ' Alone Tonight ' and ' Sun & Moon ' .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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