1976
He obtained his Diploma of Civil Engineering in Structural Engineering ( 1972 ) from the  National Technical University of Athens   Greece  and the Doctor of Engineering ( 1977 Dr.-Ing. ' Mit Auszeichnung ' with the Highest Honors ) in Soil Mechanics .
 country of headquarters: National Technical University of Athens, Greece
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: National Technical University of Athens, Greece