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Minnesota v. Clover Leaf Creamery Co. , was a United States Supreme Court case which found no violation of the equal protection or commerce clauses in a state statute banning retail sale of milk in plastic nonreturnable , nonrefillable containers , but permitting such sale in other nonreturnable , nonrefillable containers .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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