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They were in turn replaced by the pair of cast iron lights at nearby Dovercourt ; these too remain in situ , but were decommissioned ( again due to shifting of the channel ) in 1917 .
 Dovercourt
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:
 Dovercourt