user: Question: Name the rank timeslot for 18-49 share being 13
Columns: ['Episode', 'First Air Date', 'Rating (18–49)', 'Share (18–49)', 'Viewers (millions)', 'Rank (timeslot)']
Types: ['real', 'text', 'text', 'real', 'text', 'text']
Sample row: [1.0, 'January 5, 2009', '3.1', 8.0, '8.74', 'N/A']
SQL:

assistant: SELECT "Rank (timeslot)" FROM "Table" WHERE "Share (18–49)" = 13.0;