150776
Background Willumsen first thought of creating the relief when he was at the Chicago World Fair in 1893 , envisaging it as a decoration for a wall in one of the city 's bars .
 Willumsen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Willumsen