1090
His father was former  Sierra Leone  's president  Siaka Stevens  who ruled Sierra Leone between 1967 to 1988 mostly under a one-party state .
 alternate names: Sierra Leone, Siaka Stevens
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "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} 
Answer:
 alternate names: Sierra Leone, Siaka Stevens