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The Nigerian president is expected to return to his country at the end of next week after visiting South Korea and Turkey .
 geographical social political: Nigerian; geographical social political: his country; geographical social political: South Korea; geographical social political: Turkey; person: The Nigerian president; person: his
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 geographical social political: Nigerian; geographical social political: his country; geographical social political: South Korea; geographical social political: Turkey; person: The Nigerian president; person: his