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.

Category: CLASSIC MOVIES 
Clue: A 35-foot-long muslin stocking was used to create the cyclone for this 1939 film
the wizard of oz

Category: ART SUBJECTS 
Clue: Seen in sculpture, Eustache de St. Pierre & 5 other wealthy men made themselves hostages to free this city
calais

Category: AMERICAN CITIES 
Clue: 6 of the top 10 U.S. cities in population are found in these 2 states

california & texas