3577
Less than one year later Mr G.H.Wooler a surgeon in Leeds learned about their escape from Romania and in search himself of a cardiac surgeon to bolster his fledgling unit at the  Leeds General Infirmary  invited the Ionescus to come to  England  and helped them to join his unit where they were able to work and develop their many original ideas .
 country of headquarters: Leeds General Infirmary, England
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: Leeds General Infirmary, England