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Notable Nova Scotian folklorist and cultural historian Helen Creighton spent the majority of her lifetime recording the various Celtic musical and folk traditions of rural Nova Scotia during the mid-20 th century , prior to this knowledge being wiped out by mass media assimilation with the rest of North America .
 location: Nova Scotian; person: Helen Creighton; location: Nova Scotia; location: North America
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: Nova Scotian, Helen Creighton, Nova Scotia, North America 
Answer:
 location: Nova Scotian; person: Helen Creighton; location: Nova Scotia; location: North America