286999
Claim They brought an action in the United States District Court for the District of Minnesota seeking a declaration that the Communist Control Act of 1954 ( 50 USC 841-842 ) was constitutionally invalid , and praying for a temporary restraining order and permanent injunction requiring the Secretary of State of Minnesota to include the names of the plaintiff candidates on the November 1968 ballot .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None