human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Episode, Air Date, Timeslot, Rating, Share, 18–49 (Rating/Share), Viewers (m), Rank (#)
###Question: What is the timeslot for the episode that aired April 28, 2009?
gpt
SELECT Timeslot FROM table WHERE Air Date = april 28, 2009