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Professional career After working as an assistant animator in London , Potterton joined the NFB in 1954 where he directed both animated and live-action films .
 person: Potterton; organization: NFB
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Potterton; organization: NFB