1287
The same year he was accepted for Ph.D. training at the  School of International Service  in the American University in  Washington  D.C. During his studies at SIS he also took classes at the Space Policy Institute at George Washington University .
 city of headquarters: School of International Service, Washington
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:
 city of headquarters: School of International Service, Washington