user: Question: How many millions of US viewers watched the episode written by Jack Sanderson?
Columns: ['No. in series', 'Title', 'Directed by', 'Written by', 'U.S. viewers (millions)', 'Original U.S. air date', 'Prod. code']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, '"Crazy Ten Minute Sale"', 'Fred Savage', 'Todd J. Greenwald', '5.9', 'October12,2007', 102.0]
SQL:

assistant: SELECT "U.S. viewers (millions)" FROM "Table" WHERE "Written by" = 'Jack Sanderson';