user: Question: What is the original air date the was written by Mark St. Germain and direct by Jay Sandrich?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real']
Sample row: [125.0, 1.0, '"Denise: The Saga Continues"', 'Tony Singletary', 'Carmen Finestra & Gary Kott & John Markus', 'September 21, 1989', 601.0]
SQL:

assistant: SELECT "Original air date" FROM "Table" WHERE "Written by" = 'Mark St. Germain' AND "Directed by" = 'Jay Sandrich';