50243
Began combat operations in February 1944 , providing protection for U.S. bases and escorting transports initially , then escorting bombers over New Guinea and sea convoys to Admiralty Islands .
 None
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:  
Answer:
 None