Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the date of the episode that is before 307, run time equals 5:48 and has P.T. Barnum as the topic?

### Inputs:
table_name: table, columns: ['Episode Number', 'Title', 'Podcast Date', 'Run time', 'Historical References']

### Response:
SELECT Podcast Date FROM table WHERE Episode Number < 307 AND Historical References = p.t. barnum AND Run time = 5:48