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Bloody Sunday or Belfast 's Bloody Sunday was a day of violence in Belfast , Northern Ireland , on 10 July 1921 , during the Irish War of Independence .
 location: Northern Ireland
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Northern Ireland 
Answer:
 location: Northern Ireland