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The relations were restored with the resolution at a Rio Group summit held in Santo Domingo , Dominican Republic , on March 7 , 2008 .
 Rio Group, Santo Domingo, Dominican Republic
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Rio Group, Santo Domingo, Dominican Republic