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Today the watercourse starts roughly where the Ellesmere Road ( the A528 ) crosses the old course of the Severn , and runs through the marshy area at first in a southeasterly direction , then a southerly direction .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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