312398
Universidad de Concepción , Unión San Felipe and La Serena were relegated last season after finishing 15th , 17th and 18th overall , respectively .
 Universidad de Concepción, Unión San Felipe, La Serena
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Universidad de Concepción, Unión San Felipe, La Serena