40193
Further east , the salinity increases and the freshwater fish species are completely replaced by euryhaline marine ones , until the river reaches Gravesend , at which point conditions become fully marine and the fish fauna resembles that of the adjacent North Sea and includes both euryhaline and stenohaline marine species .
 location: Gravesend; location: North Sea
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: Gravesend, North Sea 
Answer:
 location: Gravesend; location: North Sea