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Her first posting was to Halifax ( former city ) , Nova Scotia where she was tasked to patrol the harbour approaches to free up major warships for convoy duty .
 location: Halifax ( former city ); location: Nova Scotia
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: Halifax ( former city ), Nova Scotia 
Answer:
 location: Halifax ( former city ); location: Nova Scotia