user: Question: What is the average episode number on 19 March 1993 with Jim Sweeney as performer 1?
Columns: ['Date', 'Episode', 'Performer 1', 'Performer 2', 'Performer 3', 'Performer 4']
Types: ['text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['5 March 1993', 1.0, 'Greg Proops', 'Ryan Stiles', 'Colin Mochrie', 'Tony Slattery']
SQL:

assistant: SELECT AVG("Episode") FROM "Table" WHERE "Performer 1" = 'Jim Sweeney' AND "Date" = '19 March 1993';