7550
This went against usual practice - usually engines are designed and produced by a dedicated company though in the  UK  the  Bristol Aeroplane Company  had a substantial engine business and Armstrong Whitworth Aircraft was part of the same business as Armstrong Siddeley The successful Gipsy and the later developments such as the Gipsy Major were successful and popular power units being used in nearly all of de Havilland's light designs and several aircraft from other manufacturers .
 country of headquarters: UK, Bristol Aeroplane Company
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:
 country of headquarters: UK, Bristol Aeroplane Company