1047
President Omar al-Beshir's two key challengers Yasser Arman of the former southern rebel  Sudan  People's Liberation Movement and former Prime Minister  Sadiq al-Mahdi  both pulled out of the race before polling day .
 employee of: Sudan, Sadiq al-Mahdi
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: Sudan, Sadiq al-Mahdi