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Angola ( also Portuguese Angola ; formerly Portuguese West Africa , since 1951 Overseas Province of Angola , and finally State of Angola from 1972 to independence ) is the common name by which the Portuguese colony in southwestern Africa was known across different periods of time .
 Angola, Portuguese Angola, Portuguese, Angola, Angola, Portuguese
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Angola, Portuguese Angola, Portuguese, Angola, Angola, Portuguese