56644
The formula was derived by Agner Krarup Erlang and is not limited to telephone networks , since it describes a probability in a queuing system ( albeit a special case with a number of servers but no queueing space for incoming calls to wait for a free server ) .
 person: Agner Krarup Erlang
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: Agner Krarup Erlang 
Answer:
 person: Agner Krarup Erlang