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On May 16 , 1916 , the 1/1st Yorkshire Hussars reassembled under Lieutenant Colonel W Pepys as Corps Cavalry to XVII Corps and were present at the Battle of Arras .
 Yorkshire, Cavalry
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Yorkshire, Cavalry