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Clark  was elected Leader of the Labor Party in  December 1993  and served as Leader of the Opposition until the general election in November 1999 when Labor was again elected to government .
 employee of: Clark, December 1993
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:  Clark, December 1993 
Answer:
 employee of: Clark, December 1993