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For the visual effects used throughout the film , actor Bruce Willis and director Len Wiseman stated that they wanted to use a limited amount of computer-generated imagery ( CGI ) .
 person: Bruce Willis; person: Len Wiseman
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: Bruce Willis; person: Len Wiseman