1923
From 1990 to 1996 Barnett trained as a doctor at  London  's Charing Cross and Westminster Medical School now the  Imperial College School of Medicine  .
 city of headquarters: London, Imperial College School of Medicine
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: London, Imperial College School of Medicine