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On 30 June Fremantle met the famous commander of the Army of  Northern Virginia  for the first time and learned from Longstreet that General George Meade had replaced Joseph Hooker as commander of the  Army of the Potomac  .
 state or province of headquarters: Northern Virginia, 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:
 state or province of headquarters: Northern Virginia, Army of the Potomac