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Prof. dr. Yijin Ren is currently Head of the Department of Orthodontics at the University Medical Center Groningen UMCG and Director of the W.J. Kolff Institute for BioMedical Engineering and Biomaterials.
 Ren, Groningen
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: place of death, place of birth, education degree, education institution 
Text: {0} 
Answer:
 Ren, Groningen