Table: ny_undercover_episodes_4
Columns: series
season
title
directed_by
original_air_date
production_code

Question: What title aired on March 19, 1998?
SQL: SELECT "title" FROM ny_undercover_episodes_4 WHERE "original_air_date" = 'march 19, 1998'

Question: Who directed the show with the production code k2708?
SQL: SELECT "directed_by" FROM ny_undercover_episodes_4 WHERE "production_code" = 'k2708'

Question: What is the season for series 81?
SQL: SELECT "season" FROM ny_undercover_episodes_4 WHERE "series" = 81