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The Southern Poverty Law Center describes Porth 's claims that the 16th Amendment to the United States Constitution " put Americans into economic bondage to the international bankers " as a thinly veiled anti-Semitic reference to the supposed " international Jewish banking conspiracy . "
 Southern Poverty Law Center, Porth
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Southern Poverty Law Center, Porth