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Maryam Abacha ( born 4 March 1947 Kaduna ) is the widow of  Sani Abacha  de facto President of  Nigeria  from 1993 to 1998 .
 country of birth: Sani Abacha, Nigeria
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:  Sani Abacha, Nigeria 
Answer:
 country of birth: Sani Abacha, Nigeria