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He returned to Matanzas and became a teacher and later a professor for the University of Havana , where he taught languages ( he claimed fluency in English , French , Spanish , and Italian ) : he was also well instructed in mathematics , and geography .
 Matanzas, Havana
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Matanzas, Havana