6423
During 1986 and 1987 he was Visiting Professor in the Department of Molecular Biology and Genetics at The  Johns Hopkins University School of Medicine  in  Baltimore  Md .
 city of headquarters: Johns Hopkins University School of Medicine, Baltimore
Given options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  Johns Hopkins University School of Medicine, Baltimore 
Answer:
 city of headquarters: Johns Hopkins University School of Medicine, Baltimore