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Six different definitions of the term geopolymerFor chemists For geopolymer chemistsHuang Yi and Han Minfang ( 2011 ) ( China University of Mining and Technology Beijing ) The influence of addition on microstructure mechanical and formaldehyde adsorption properties of fly ash-based geopolymer products Journal of Hazardous Materials 193 90 94 For geopolymer material chemistsPimraksaa K. ; Chindaprasirt P. ; Rungchet A. ; Sagoe-Crentsil K. and Sato T. ( 2011 ) ( Department of Industrial Chemistry  Chiang Mai University   Thailand  ; CSIRO Melbourne Australia ; Tohoku University Sendai Japan ) Lightweight geopolymer made of highly porous siliceous materials with various Na2O/Al2O3 and SiO2/Al2O3 ratios Materials Science and Engineering A 528 6616 6623 .
 country of headquarters: Chiang Mai University, Thailand
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: Chiang Mai University, Thailand