23058
His early work in scrutinizing the use of local , exchange and trunk telephone line usage in a small community to understand the theoretical requirements of an efficient network led to the creation of the Erlang formula , which became a foundational element of modern telecommunication network studies .
 Erlang
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Erlang