Database: imdb
Question: List all the directors of movies about nuclear weapons
SQL:
SELECT t3.name FROM director AS t3 JOIN directed_by AS t2 ON t3.did  =  t2.did JOIN movie AS t4 ON t4.mid  =  t2.msid JOIN tags AS t5 ON t5.msid  =  t4.mid JOIN keyword AS t1 ON t5.kid  =  t1.id WHERE t1.keyword  =  "nuclear weapons";