52091
The later work , in the 3rd century BC , of Archimedes and Apollonius studied more systematically problems on conic sections , and also involved the use of coordinates .
 person: Archimedes; person: Apollonius
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: Archimedes, Apollonius 
Answer:
 person: Archimedes; person: Apollonius