81957
The topic of complex numbers was also being studied by other mathematicians , notably Carl Friedrich Gauss and Caspar Wessel .
 person: Carl Friedrich Gauss; person: Caspar Wessel
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: Carl Friedrich Gauss, Caspar Wessel 
Answer:
 person: Carl Friedrich Gauss; person: Caspar Wessel