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During the playoffs , Joe Louis Arena was generally adorned with a giant octopus with red eyes , nicknamed " Al " after head ice manager Al Sobotka .
 Joe Louis Arena, Al Sobotka
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Joe Louis Arena, Al Sobotka