717
Mount Vernon dedicated the newly reconstructed slave cabin Wednesday at a ceremony attended by some descendants of Washington's slaves who kept the plantation running while  he  served as general of the  Continental Army  and later as the first U.S. president .
 employee of: he, Continental Army
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: he, Continental Army