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In 1999 , Riofrío was elected as a councillor to the San Juan city council , serving until 2003 when she returned to the provincial government as Subsecretary of Development and Family Promotion .
 Riofrío, Juan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Riofrío, Juan