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On April 1 2001 a mid-air collision between a United States Navy EP-3E ARIES II signals intelligence aircraft and a People's Liberation Army Navy (  PLAN  ) J-8II interceptor fighter jet resulted in an international dispute between the United States of America and the  People's Republic of China  called the Hainan Island incident .
 country of headquarters: PLAN, People's Republic of China
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: PLAN, People's Republic of China