124038
It was invented in the 1940 s independently by two mathematicians , Piet Hein and John Nash .
 person: Piet Hein; person: John Nash
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: Piet Hein, John Nash 
Answer:
 person: Piet Hein; person: John Nash