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He was ordained after a period of study at Ridley Hall , Cambridge in 1891 .
 organization: Ridley Hall , Cambridge
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: Ridley Hall , Cambridge 
Answer:
 organization: Ridley Hall , Cambridge