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teamed with the composer Philip Glass , recorded traditional music , and collaborated with the conductor Nelson Riddle , an event at that time viewed as an original and unorthodox move for a rock-and-roll artist .
 person: Philip Glass; person: Nelson Riddle
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: Philip Glass; person: Nelson Riddle