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His efforts in reforming the pension system were rewarded with a letter of thanks from the Secretary of the  Interior   Carl Schurz  .
 employee of: Interior, Carl Schurz
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:  Interior, Carl Schurz 
Answer:
 employee of: Interior, Carl Schurz