TASK DEFINITION: You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
PROBLEM: Category: HISTORIC LASTS 
Clue: In the "thanks a lot, fellas" department, Mongolia was the last country to join this group--August 9, 1945

SOLUTION: the allies

PROBLEM: Category: LITERARY OPERAS 
Clue: Operas based on this author's works include "Il Talismano", "Il Templario" & "La Prigione d'Edimburgo"

SOLUTION: sir walter scott

PROBLEM: Category: FOREIGN FILMS 
Clue: With 6, this 1981 German film holds the record for most Oscar nominations for a foreign-language film

SOLUTION:
\"das boot\"