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Johnson lived at the weekend retreat for 58 years , and since 1960 with his longtime companion , David Whitney , an art critic and curator who helped design the landscaping and largely collected the art displayed there .
 Johnson, David Whitney
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Johnson, David Whitney