7138
" Description : " The book by the mathematician John von Neumann and economist Oskar Morgenstern .
 person: John von Neumann; person: Oskar Morgenstern
Please list all entity words in the text that fit the category.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} 
Answer:
 person: John von Neumann; person: Oskar Morgenstern