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Duncan Ferguson ( born January 1 , 1901 , Shanghai , China - died April 29 , 1974 , Santa Monica , California ) was a Shanghai - born American sculptor and political activist .
 Duncan Ferguson, Shanghai , China, Santa Monica , California, Shanghai
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Duncan Ferguson, Shanghai , China, Santa Monica , California, Shanghai