4973
Patterson wrote in August 1845 to  Treasury  Secretary  Robert J. Walker  that Longacre is a gentleman of excellent character highly regarded in this community and has acquired some celebrity as an engraver of copper ; but he is not a Die-Sinker .
 employee of: Treasury, Robert J. Walker
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:  Treasury, Robert J. Walker 
Answer:
 employee of: Treasury, Robert J. Walker