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South Wales Transport replaced the Swansea Improvements and Tramway Company in 1937 with buses in the city of Swansea instead of trams running services .
 Wales Transport, Swansea Improvements and Tramway Company, Swansea
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Wales Transport, Swansea Improvements and Tramway Company, Swansea