Database: imdb_minus_1_0
Question: List all the directors of movies about nuclear weapons
SQL: select t1.name from director_directed_by as t1 join movie as t2 on t1.msid = t2.mid join tags as t3 on t2.mid = t3.msid join keyword as t4 on t3.kid = t4.id where t4.keyword = 'nuclear weapons' ;