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The house was built over the course of five years by Nancy and Eugene Bavinger , the residents of the house , who were artists , along with the help of a few of Eugene 's art students , volunteers , and local businesses .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None