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Its numerous branches also connect the main line to , , , Harwich and a number of coastal towns including Southend-on-Sea , , and .
 Harwich, Southend-on-Sea
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Harwich, Southend-on-Sea