62
1Institute of Ultrasonic Engineering in Medicine and Clinical Center for Tumor Therapy of 2nd Hospital  Chongqing University  of Medical Sciences Box 153 1 Medical College Road  Chongqing  400016 China .
 city of headquarters: Chongqing University, Chongqing
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: Chongqing University, Chongqing