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He was diagnosed with brain cancer in the fall of 2011 and has ever since concentrated solely on his own career , including the 2012 albums A Part of You and Midnight Garden , the latter being a collaboration with his friend Brad Roberts of the Crash Test Dummies .
 person: Brad Roberts
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: Brad Roberts 
Answer:
 person: Brad Roberts