3478
European Air Transport  N.V. / S.A. ( EAT ) was a cargo airline with its head office in Building 4-5 on the grounds of Brussels Airport and in Zaventem  Belgium  .
 country of headquarters: European Air Transport, Belgium
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:  European Air Transport, Belgium 
Answer:
 country of headquarters: European Air Transport, Belgium