71794
Polish inventor Jan Szczepanik patented a color television system in 1897 , using a selenium photoelectric cell at the transmitter and an electromagnet controlling an oscillating mirror and a moving prism at the receiver .
 person: Jan Szczepanik
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: Jan Szczepanik 
Answer:
 person: Jan Szczepanik