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The Monumento a la abolición de la exclavitud ( Monument to the abolition of slavery ) is a monument in Barrio Tercero in Ponce , Puerto Rico , dedicated to the abolition of slavery in Puerto Rico in 1873 .
 Tercero, Ponce , Puerto Rico, Puerto Rico
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Tercero, Ponce , Puerto Rico, Puerto Rico