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When opened in 1890 , the line had six stations and ran for in a pair of tunnels between the City of London and Stockwell , passing under the River Thames .
 City of London, Stockwell, River Thames
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:
 City of London, Stockwell, River Thames