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On March 27 , 2012 , the ACLU reaffirmed its stance in support of the Supreme Court 's " Citizens United " ruling , at the same time voicing support for expanded public financing of election campaigns and stating the organization would firmly oppose any future constitutional amendment limiting free speech .
 ACLU, Supreme Court, Citizens United
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 ACLU, Supreme Court, Citizens United