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Some 23 million Colombians are registered to vote Sunday to elect governors , mayors and other local officials in the South American nation , but the election is taking place in the midst of a rising wave of assassinations , kidnappings and threats against the candidates by leftist guerillas and right - wing paramilitary groups .
 23 million, Colombians, Sunday, South American
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 23 million, Colombians, Sunday, South American