Database: movies_4
Question: Write all the keywords belonging to the movie 'Sky Captain and the World of Tomorrow.'
SQL: SELECT T3.keyword_name FROM movie AS T1 INNER JOIN movie_keywords AS T2 ON T1.movie_id = T2.movie_id INNER JOIN keyword AS T3 ON T2.keyword_id = T3.keyword_id WHERE T1.title = 'Sky Captain and the World of Tomorrow'