123519
Its express purpose is to provide port and harbor security , and offshore protection for maritime infrastructure and Military Sealift Command ships operating in coastal waterways .
 organization: Military Sealift Command
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: Military Sealift Command 
Answer:
 organization: Military Sealift Command