4576
Maj. Gen.  Joseph Hooker  who became commander of the  Army of the Potomac  in January 1863 ordered his deputy provost marshal Col. George H. Sharpe to create a unit to gather intelligence .
 top members employees: Joseph Hooker, Army of the Potomac
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:
 top members employees: Joseph Hooker, Army of the Potomac