284400
The name of the river is first recorded in the 13th century as le Markediche , meaning ' boundary ditch ' and referring to the ancient boundary between the parishes of Dagenham and Hornchurch which later gained borough status .
 location: Dagenham; location: Hornchurch
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: Dagenham, Hornchurch 
Answer:
 location: Dagenham; location: Hornchurch