38441
The Defense Red Switch Network consists of four major subsystems : the Switching Subsystem , the Transmission Subsystem , the Timing and Synchronization Subsystem , and the Network Management Subsystem .
 organization: Defense
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: Defense 
Answer:
 organization: Defense