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On the afternoon of 17 April , the day Virginia seceded , Engineer in Chief B. F. Isherwood managed to get the frigate 's engines lit. However , the previous night secessionists had sunk light boats between Craney Island and Sewell 's Point , blocking the channel .
 Virginia, B. F. Isherwood, Craney Island, Sewell 's Point
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:
 Virginia, B. F. Isherwood, Craney Island, Sewell 's Point