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On 4 April 1955 he sent a memorandum to his BeNeLux colleagues  Paul-Henri Spaak  (  Belgium  ) and Joseph Bech ( Luxembourg ) in which he proposed his idea of a customs union .
 countries of residence: Paul-Henri Spaak, Belgium
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:
 countries of residence: Paul-Henri Spaak, Belgium