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Thornton Heath is a town , to the northwest of Croydon , which holds Croydon 's principal hospital Mayday .
 location: Thornton Heath; location: Croydon; location: Croydon; location: Mayday
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: Thornton Heath, Croydon, Croydon, Mayday 
Answer:
 location: Thornton Heath; location: Croydon; location: Croydon; location: Mayday