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Playing career Aitken spent parts of two seasons in the National Hockey League , although the majority of his career took place in the minors or Europe .
 person: Aitken; organization: National Hockey League; location: Europe
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: Aitken; organization: National Hockey League; location: Europe