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Challenge Cup final appearances Bob Ayres played right - , i.e. number 12 in Barrow 's 4-7 defeat to Salford in the 1937 – 38 Challenge Cup final at Wembley on Saturday 7 May 1938 .
 Ayres, Barrow, Salford
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ayres, Barrow, Salford