CREATE TABLE table_2226817_7 (directed_by VARCHAR2, original_air_date VARCHAR2)

If the original air date January 19, 1992, who was the episode directed by?
SELECT directed_by FROM table_2226817_7 WHERE original_air_date = "January 19, 1992"
SELECT "directed_by" FROM "table_2226817_7" WHERE "January 19, 1992" = "original_air_date"