15052
The Spitfire was designed as a short-range high-performance interceptor aircraft by  R. J. Mitchell  chief designer at  Supermarine  Aviation Works ( which operated as a subsidiary of Vickers-Armstrong from 1928 ) .
 R. J. Mitchell, Supermarine
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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:
 R. J. Mitchell, Supermarine