11048
The  East African Community  Treaty was signed on November 30 1999 in Arusha  Tanzania  between five countries including Burundi Kenya Rwanda Uganda and The United Republic of Tanzania .
 country of headquarters: East African Community, Tanzania
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: East African Community, Tanzania