human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: No. in series, No. in season, Title, Directed by, Written by, Original air date, U.S. viewers (millions)
###Question: What was the original air date for the episode with 13.92 million us viewers?
gpt
SELECT Original air date FROM table WHERE U.S. viewers (millions) = 13.92