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He started to compile a vocabulary , and later , during World War II at Birmingham , he devised some guidelines of syntax , thus completing the draft of a new auxiliary language especially based on the lexicon of modern science : Eventually , Hogben became convinced that such an auxiliary language appeared to be more necessary than ever before , so he decided to publish his proposal , insisting that it was simply a draft : Interglossa might be seen as the draft of its descendant auxiliary language Glosa , which has partly changed and expanded the lexicon .
 Birmingham, Hogben
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Birmingham, Hogben