CREATE TABLE "season_4_1998" (
  "series_num" real,
  "season_num" real,
  "title" text,
  "directed_by" text,
  "original_air_date" text,
  "production_code" text
);

Question: What title aired on March 19, 1998?
SQL: SELECT "title" FROM "season_4_1998" WHERE "original_air_date"='march 19, 1998';

Question: Who directed the show with the production code k2708?
SQL: SELECT "directed_by" FROM "season_4_1998" WHERE "production_code"='k2708';

Question: What is the season for series 81?
SQL: SELECT "season_num" FROM "season_4_1998" WHERE "series_num"=81;