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The final three were held on 7 December on a constitutional amendment on the right to residence and welfare benefits ( approved ) , a constitutional amendment on water management ( approved ) and a federal law on the import and export of agricultural goods ( approved ) .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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