Who were the writers of episode 20?
CREATE TABLE table_20538157_2 (written_by VARCHAR, no_in_season VARCHAR)
SELECT written_by FROM table_20538157_2 WHERE no_in_season = 20
### Context: CREATE TABLE table_20538157_2 (written_by VARCHAR, no_in_season VARCHAR) ### Question: Who were the writers of episode 20? ### Answer: SELECT written_by FROM table_20538157_2 WHERE no_in_season = 20