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The 12th battalion was named as a Tyneside Scottish unit and on 31 January 1940 the battalion left the regiment to become 1st battalion , Tyneside Scottish of the Black Watch ( Royal Highland Regiment ) .
 Black Watch, Royal Highland Regiment
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Black Watch, Royal Highland Regiment