10543
Before leaving Hungary to work full-time in  London  with his brother  Alexander  Korda served in the Hungarian Army as a cavalry officer .
 cities of residence: London, Alexander
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:  London, Alexander 
Answer:
 cities of residence: London, Alexander