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He was later appointed by  Israel  's Prime Minister  Ehud Barak  in 1999 to negotiate the Sharm el-Sheikh Memorandum which was signed on September 4 1999 between Israel and the PLO .
 employee of: Israel, Ehud Barak
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:  Israel, Ehud Barak 
Answer:
 employee of: Israel, Ehud Barak