6643
Enlisting in the  Royal Army Medical Corps  of the  British Army  in September 1914 Lance Corporal Chapin was killed in action at the age of 29 at the Battle of Loos in 1915 leaving a wife and five year old son .
 subsidiaries: Royal Army Medical Corps, British Army
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:  Royal Army Medical Corps, British Army 
Answer:
 subsidiaries: Royal Army Medical Corps, British Army