user: Question: what is the total viewers (m) when the rating is 6.4 and the share is more than 11?
Columns: ['Episode', 'Air date', 'Rating', 'Share', '18-49 (Rating/Share)', 'Viewers (m)', 'Rank (timeslot)']
Types: ['text', 'text', 'real', 'real', 'text', 'real', 'text']
Sample row: ['"Welcome to the Club"', 'October 12, 2007', 7.3, 13.0, '2.5/8', 10.82, '#1']
SQL:

assistant: SELECT SUM("Viewers (m)") FROM "Table" WHERE "Rating" = 6.4 AND "Share" > 11.0;