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Since they were found to be fast and reliable engines , four more were delivered in 1880 , built by Neilson and Company and practically identical to the previous seven , but equipped with small optional four-wheeled water tenders .
 Neilson and 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:
 Neilson and Company