43763
It consists of the rivers Irwell and Mersey made navigable to Manchester for seagoing ships leaving the Mersey estuary .
 location: Irwell; location: Mersey; location: Manchester; location: Mersey
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Irwell, Mersey, Manchester, Mersey 
Answer:
 location: Irwell; location: Mersey; location: Manchester; location: Mersey