13811
Twelve heads of state or government have attended or graduated from Penn including former U.S. president William Henry Harrison ; former Prime Minister of the  Philippines   Cesar Virata  ; the first president of Nigeria Nnamdi Azikiwe ; the first president of Ghana Kwame Nkrumah ; and the current president of d'Ivoire Alassane Ouattara .
 employee of: Philippines, Cesar Virata
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:
 employee of: Philippines, Cesar Virata