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When the single was to be released to radio , it was produced further by Walter Afanasieff who added string and electric guitar , as well as rearranged portions of the song .
 person: Walter Afanasieff
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: Walter Afanasieff