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In addition to growing a significant amount of food , the Derveas family attempts to live off-grid as far as possible and have invested significant amounts of money to experiment with other ways of attaining self-sufficiency .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None