70710
The most popular stockings were sheer hosiery which were first made of silk or rayon ( then known as " artificial silk " ) , and after 1940 of nylon , which had been invented by DuPont in 1938 .
 organization: DuPont
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: DuPont 
Answer:
 organization: DuPont