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In preparation for the invasion of Normandy , Frankford escorted transport s and other ships to training in Scottish waters and to the assembly points in the south of England , until 5 June , when she sortied from Plymouth for Omaha Beach .
 Plymouth
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Plymouth