306219
In 1926 , Bell System engineers Albert L. Thuras and Edward C. Wente modified the horn loudspeaker by inserting the first phase plug between the driver and the horn .
 organization: Bell System; person: Edward
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Bell System, Edward 
Answer:
 organization: Bell System; person: Edward