user: Question: What is the date of the episode that is before 307, run time equals 5:48 and has P.T. Barnum as the topic?
Columns: ['Episode Number', 'Title', 'Podcast Date', 'Run time', 'Historical References']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [301.0, '"Home Sweet Home!"', 'August 1, 2005', '6:07', 'None']
SQL:

assistant: SELECT "Podcast Date" FROM "Table" WHERE "Episode Number" < 307.0 AND "Historical References" = 'P.T. Barnum' AND "Run time" = '5:48';