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Embraer  Defense and Security on August 16 2012 delivered the first EMB 145 Airborne Early Warning and Control ( ) class of aircraft to the Government of India in a ceremony held at Embraer headquarters in  dos Campos  Brazil .
 city of headquarters: Embraer, dos Campos
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:  Embraer, dos Campos 
Answer:
 city of headquarters: Embraer, dos Campos