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One notable use of this design in higher levels is with the Pittsburgh Steelers , who kept their diagonal-line end zone decoration at Heinz Field after positive fan reaction .
 Pittsburgh Steelers, Heinz Field
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Pittsburgh Steelers, Heinz Field