5411
Windsor Castle was begun in the 11th century by William the Conqueror as it afforded a good defensive point over the River Thames .
 location: Windsor Castle; person: William the Conqueror; location: River Thames
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: Windsor Castle; person: William the Conqueror; location: River Thames