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The course of the river then turns north as the estuary narrows between Liverpool and Birkenhead on the Wirral Peninsula to the west , and empties into Liverpool Bay .
 location: Liverpool; location: Birkenhead; location: Wirral Peninsula; location: Liverpool Bay
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Liverpool; location: Birkenhead; location: Wirral Peninsula; location: Liverpool Bay