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[ 1 ] Leinster He made his Magners League debut for Leinster versus Cardiff Blues at Arms Park on 28 September 2007 .
 Leinster, Magners League, Leinster, Cardiff Blues
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Leinster, Magners League, Leinster, Cardiff Blues