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He is particularly notable for having published the underground newspaper La Libre Belgique during the German occupation and for holding the position of President of the Senate between 1950 and 1954 .
 Libre Belgique
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Libre Belgique