human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Episode #, Title, Air Date, Rating, Share, 18–49, Viewers, Rank
###Question: What is the Air Date that has a 18–49 larger than 1.9, less than 7.54 viewers and a rating less than 4.9?
gpt
SELECT Air Date FROM table WHERE 18–49 > 1.9 AND Viewers < 7.54 AND Rating < 4.9