1485
East of the city and of the Sumida River , a network of canals was dug .
 location: Sumida River
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: Sumida River 
Answer:
 location: Sumida River