2697
On August 1 2006 the  1st Infantry Division  returned to  Fort Riley  and replaced the 24th Infantry Division as the post's main Division .
 city of headquarters: 1st Infantry Division, Fort Riley
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:
 city of headquarters: 1st Infantry Division, Fort Riley