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In 1923 , H.C. Lawlor and the Belfast Natural History and Philosophical Society partly renovated the castle to avoid further erosion and built a buttress wall to support the structure at the northeast corner of the tower .
 organization: Belfast Natural History and Philosophical Society
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: Belfast Natural History and Philosophical Society 
Answer:
 organization: Belfast Natural History and Philosophical Society