What is the production code for the episode directed by Sam weisman?
CREATE TABLE table_25604014_4 (production_code VARCHAR, directed_by VARCHAR)
SELECT production_code FROM table_25604014_4 WHERE directed_by = "Sam Weisman"
### Context: CREATE TABLE table_25604014_4 (production_code VARCHAR, directed_by VARCHAR) ### Question: What is the production code for the episode directed by Sam weisman? ### Answer: SELECT production_code FROM table_25604014_4 WHERE directed_by = "Sam Weisman"