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All the steam locomotives currently in use on the railway are B-Class , built by Sharp , Stewart and Company and later the North British Locomotive Company between 1889 and 1925 .
 B-Class, Sharp , Stewart and Company, North British Locomotive Company
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 B-Class, Sharp , Stewart and Company, North British Locomotive Company