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The motor cars were built by Norsk Elektrisk & Brown Boveri and Skabo while the centre cars were built by Strømmen and the end cars by Skabo .
 Norsk Elektrisk & Brown Boveri, Skabo, Strømmen, Skabo
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Norsk Elektrisk & Brown Boveri, Skabo, Strømmen, Skabo