27443
The action was fought between a German U-boat and two United States Navy destroyer s in the North Atlantic Ocean .
 location: German; location: United States Navy
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: German, United States Navy 
Answer:
 location: German; location: United States Navy