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The MDL lists among its international collaborators Silvio Berlusconi 's Forza Italia , the extreme-right National Alliance party in Italy , the Republican Party in the United States , the right-wing ARENA party in El Salvador , the pro-Pinochet Independent Democratic Union ( UDI ) in Chile , and the Popular Party in Spain .
 Forza Italia, National Alliance, Republican Party, ARENA, Independent Democratic Union, Popular Party
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Forza Italia, National Alliance, Republican Party, ARENA, Independent Democratic Union, Popular Party