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.
--------
Question: Category: TRANSPORTATION 
Clue: In 1910 the "Deutschland" inaugurated commercial passenger service in one of these

Answer: zeppelin/dirigible


Question: Category: MONARCHIES 
Clue: 1 of the 2 largely German-speaking monarchies in the world; they're about 250 miles apart

Answer: liechtenstein & luxembourg


Question: Category: WORD ORIGINS 
Clue: From the name of a committee created by Gregory XV to spread the faith, it means info used to spread a belief

Answer:
propaganda