50815
By the 1860 census on the verge of the Civil War , 91.7 % of the black population were free ; 1,798 were slaves , as compared to 19,829 " free colored persons " .
 event: Civil War
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: Civil War 
Answer:
 event: Civil War