15910
According to historian Hilda Kean , the Research Defence Society , a lobby group founded in 1908 to counteract the antivivisectionist campaign , discussed how to have the revised editions withdrawn because of the book 's impact .
 person: Hilda Kean; organization: Research Defence Society
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Hilda Kean, Research Defence Society 
Answer:
 person: Hilda Kean; organization: Research Defence Society