user: Question: What is the total ratings on share less than 4?
Columns: ['Episode', 'Air Date', 'Timeslot', 'Rating', 'Share', '18-49', 'Viewers', 'Weekly Rank']
Types: ['text', 'text', 'text', 'real', 'real', 'text', 'text', 'text']
Sample row: ['"Pilot"', 'March 2, 2008', '10:00 P.M.', 3.8, 6.0, '2.6/6 (#2)', '5.77 (#4)', 'N/A']
SQL:

assistant: SELECT SUM("Rating") FROM "Table" WHERE "Share" < 4.0;